Greece's prime minister has taken on critics in his Syriza party ahead of another crucial vote on reforms.

Alexis Tsipras attacked rebel MPs who opposed an agreement with creditors, accusing them of "hiding behind the safety of my signature".

MPs need to back the reforms for talks to start on a new €86bn bailout.

The European Central Bank (ECB) is said to have increased its cash lifeline to Greek banks by €900m (£630m) just hours before the vote.

The proposed reforms are expected to get parliamentary approval with the support of opposition parties, but Mr Tsipras hopes to avoid a rebellion from within the ranks of Syriza.Some 32 of the radical-left party's 149 MPs - including former Finance Minister Yanis Varoufakis - voted against the first tranche of bailout measures last week. Another six abstained.

The rebellion reduced Mr Tsipras's support within his own ruling coalition to 123 MPs, barely more than the minimum 120 required to sustain a minority government.

He said the Greek people had "pinned their hopes" on the government's ability to find a solution to the debt crisis, addressing Syriza MPs on Tuesday night.

"For a man who was forced into a fairly abrupt U-turn, Alexis Tsipras remains extraordinarily popular. If he calls an early election in the coming months - and that still feels like the most likely option - it would be a huge surprise if he didn't win comfortably and emerge stronger.

"That's partly because the opposition is in disarray. But also because many Greeks like the fact that he appeared to stand up for national pride.For the moment Mr Tsipras is trying to put pressure on dissenters within his own party. He had heard plenty of heroic speeches, the prime minister said, but not seen any alternative proposals.

"It's partly a reminder that he could move to exclude those who are disloyal if another election is just around the corner. But he has to get the bailout approved first - and that's not yet a done deal.Finance Minister Euclid Tsakalotos said it was "extremely important" for the vote on financial and judicial reforms to pass so that talks on the bailout could begin on Friday,". report said.