The Palestinian Authority has had to cut salaries paid to its civil servants by half as it faces a major budget shortfall.

Prime Minister Salam Fayyad called on “donors and our Arab brothers” to come to their aid, saying that international donors – notably Arab countries – had failed to deliver promised funding.

Donors had provided only $330m of a total $970 commitment for the year.

The authority has been relying on bank loans to tide it over until now.

However, in a recent report the World Bank noted that Palestinian borrowing was “unsustainable” – it was nearing its borrowing limit.

“Today is a day of crisis,” said the prime minister in Ramallah on Sunday.

Foreign donations account for just over a quarter of the total Palestinian budget of $3.7bn.