An Israeli tank shelled a Hamas site in the northern Gaza Strip on Tuesday after gunfire at soldiers near the border fence, the army said.

 

There were no reports of injuries in either incident. Hamas said two of its military wing's observation posts had been hit east of Beit Hanoun. 

 

An informal truce between Hamas and Israel has brought relative calm to the border in recent weeks.

 

But there have been warnings of another escalation since Israel reportedly held up the latest cash transfer from Gulf state Qatar to Gaza, set to take place under the truce.

 

The payments are controversial in Israel, where they have sparked opposition from right-wing activists and politicians.

 

Prime Minister Benjamin Netanyahu is campaigning for re-election in April 9 polls.

 

Qatar's ambassador to Gaza said Monday that the $15 million (13 million euros) in cash, to pay the salaries of Hamas civil servants in the enclave, is expected to be delivered via Israel this week.

 

Israel's government has not commented. Its permission is required since the cash must be delivered via Israeli territory. 

 

Hamas is labeled a terrorist organization by the United States and the European Union, and banks are hesitant to make the transfer.

 

The payment would be the third of six planned tranches, totalling $90 million, in connection with the truce. 

 

Israel has also allowed deliveries of Qatari-financed fuel to the blockaded enclave to help ease a severe electricity shortage.

 

Mass protests and clashes erupted on the Gaza-Israel border in March last year.

 

The weekly protests have been calling for Palestinian refugees in Gaza to be able to return to their former homes now inside Israel.

 

Israel accuses Hamas of using the protests as cover to carry out violence.

 

At least 243 Palestinians have been killed by Israeli fire since March, the majority during protests and clashes. Others have died in airstrikes or shelling.

 

Two Israeli soldiers have been killed over the same period, one by a Palestinian sniper and another during a botched special forces operation inside Gaza.

 

Israel and Islamist movement Hamas, which runs the Gaza Strip, have fought three wars since 2008.