It absolutely was ambiguous who had been behind the explosions but Ukrainian news stated the bridges had been blown up by rebels as Ukraine's military advanced.
Ukrainian troops regained control of the key rebel strongholds of Sloviansk and Kramatorsk on Saturday.
A journalist in Donetsk states civilians when you look at the populous town are preparing for combat.
"When it comes to minute there are not any gunfights but folks are really frightened," Yevgeny Shibalov told BBC Newshour.
"a whole lot of shops are shut plus some banking institutions formally declared they've been shutting their branches within the town," he added.
Separatist fighters driven out of Sloviansk and Kramatorsk in the week-end have actually regrouped in Donetsk.
A railway line when you look at the town of Novobakhmutivka that crosses over a primary road out of Donetsk ended up being targeted, making a sizable cargo train dangling across the void.
A witness told the AP news agency he saw number of camouflaged men go into their cars and mind towards Donetsk soon ahead of the connection collapsed after an explosion.
Two other bridges on roadways leading from Sloviansk to Donetsk were additionally damaged within the villages of Zakitne and Seleznevka, Ukraine's transport authority stated on Monday.
Ukraine's 5 Channel television stated militants had carried out of the assaults, quoting state railways as saying repairing the bridges could simply take a thirty days . 5.
Mykhaylo Koval, a senior Ukrainian safety official, stated federal government troops had been getting ready to carry on the operation contrary to the separatists.
"there clearly was a clear plan that is strategic which was authorized. The program is targeted on two major centres that are regional Luhansk and Donetsk. These towns is likely to be totally blockaded," Mr Koval stated.
"These measures can lead to the separatists - why don't we phone them bandits - being forced to lay down hands."
Meanwhile, Ukraine's richest guy, coal and steel magnate Rinat Akhmetov, pleaded because of the government on Monday never to bomb their home town of Donetsk plus the wider Donbass area.
Mr Akhmetov, whose fortune is believed at significantly more than $11bn (?6.5bn), said government forces should show discipline within their operations within the eastern of Ukraine.
"Donetsk must not be bombed. Donbass should not be bombed. Cities, towns and infrastructure must not be damaged," he told Ukrainian TV. "We must avoid enduring and fatalities of peaceful individuals."
The degree of help for the militants into the two regional capitals is uncertain. Nevertheless, thousands of individuals joined a rally in Donetsk on Sunday went to by leaders of this Donetsk that is self-declared People Republic.
The separatists declared independency in both Donetsk and Luhansk areas after Russia overran the Crimea region in March.
On Sunday, the web site of Ukrainian President Petro Poroshenko stated the nationwide banner had been raised into the towns of Artemivsk and Druzhkivka.
The 2 towns are not thought to be strategic as Sloviansk, but retaking them indicates momentum happens to be with federal government forces, says the BBC's David Stern in Kiev states.
The government in Kiev said it had begun transferring pensions to Sloviansk and the nearby city of Kramatorsk, which was also recaptured from rebels on Saturday in a separate development.
Donetsk governor that is regional Taruta said he thought electricity and wellness solutions could possibly be ready to go once again throughout the week.
"the job now could be getting the hospital working as it is without electricity; then water, sewage, and we'll work with all social solutions," he had been quoted as saying by Interfax ukrainianbrides.us Ukraine news agency.
Representatives from Ukraine, Russia plus the Organization for Security and Co-operation (OSCE) in European countries came across on Sunday to go over the problem in eastern Ukraine, but OSCE officials stated no breakthrough had been achieved.
Tensions remain high, our correspondent adds; in Kiev, regional reports stated unknown gunmen had exposed fire in the beginning Monday early morning at a tent camp within the town centre, causing accidents, but no deaths.
Russian press response to the re-taking of Sloviansk
Moskovsky Komsomolets: "for most Russians, the incorporation of Crimea ended up being the happiest moment that is political several years. Russia showed exactly exactly what it may really do if it desires to. The slaughter that is bloody south-eastern Ukraine indicates the contrary. Russia happens to be conscious of its restrictions. Our company is powerless to avert the tragedy occurring simply across our edge."
Rossiyskaya Gazeta: "Despite bravura reports, this 'victory' is a Pyrrhic one for the army that is ukrainian. Into the wake associated with massive ground and air bombardment, Sloviansk, Kramatorsk and particularly adjacent towns are far more than half destroyed - they've been changed into ghost towns. The damaged infrastructure will simply take months, or even months, to reconstruct."
Kommersant: "A breakthrough is growing within the conflict in eastern Ukraine. The capture of Sloviansk, that has been regarded as being the sign of opposition, happens to be the us government forces' biggest success over 2 months of fighting. The two sides will need to achieve an understanding, otherwise this is an extended war. although the militia has called its retreat a 'tactical manoeuvre' and Kiev has a large urge to fight until an overall total victory"