A Fatah security official was kidnapped and killed on Tuesday by Hamas gunmen, Fatah officials said. Elsewhere, the car of the governor of northern Gaza, prominent Fatah loyalist Ismail Abu Shamallah, was hit by gunfire. He escaped injury. Hamas and Fatah officials said they remained committed to the truce, and accused each other of violating the deal. "Hamas is abiding by the cease-fire," said spokesman Ismail Radwan. "The problem is that not all of Fatah's militias are participating in this decision."
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Ibrahim Abu al-Najah, a mediator who helped arrange the truce, appealed for calm. "What is going on is a violation and sabotage and I have called on both parties to shoulder their responsibility and to end what is going on in the streets," he said.
Meanwhile, a fierce gun battle between rival Fatah and Hamas forces erupted outside Gaza's main hospital Tuesday, sparking a day of factional violence that sent students diving for cover in their classrooms and brought life in much of Gaza to a standstill.
Four people were killed and at least 18 were wounded in the violence, which swept away the remains of a tattered truce meant to end a week of fighting that has turned the Gaza Strip into a war zone.
Automatic gunfire echoed throughout the nearly empty streets of Gaza City, and a Fatah security installation was attacked with mortar fire. Masked Hamas gunmen set up makeshift checkpoints on main roads, forces from both sides took up strategic positions and terrified residents shut themselves indoors.
"It's a real war. Since the morning, I've been praying to God that this is going to end," said Suleiman Tuman, a 53-year-old shopkeeper who was trapped in his Gaza City grocery store by the fighting.
"Both sides used to fight the Israelis together. Now they are directing their weapons toward each other and we're in the middle," he said. "Both sides are responsible for this war."
Hamas and Fatah have been locked in a power struggle since the Islamic group defeated Fatah in legislative elections in January. Fatah, which seeks peace with Israel, controls the presidency, while the radical Hamas, which is committed to Israel's destruction, controls parliament and the Palestinian Cabinet.
The fighting began a week ago and intensified over the weekend, when Palestinian Authority Chairman Mahmoud Abbas announced a plan to call early elections as a way to end the political impasse. Hamas has condemned the plan as a coup. In all, 13 people have died in the clashes, making it one of the deadliest bouts of Palestinian infighting ever.
PA Prime Minister Ismail Haniyeh planned a televised speech Tuesday evening. Seeking to ease the tensions, Haniyeh canceled a planned Hamas demonstration, Hamas officials said.
Abbas also called for calm. "I call on everyone without exception to stop the shooting, the murdering and all related operations. I emphasize that dialogue is the only way to achieve our national goals," he said in a statement.
Jordan's King Abdullah II and the head of the 57-national Organization of Islamic Conference attempted to intervene. Abdullah invited Abbas and Haniyeh to Amman to work out their differences, while OIC chief Ekmeleddin Ihsanoglu shuttled between the West Bank and Gaza talking to the rivals.
"We have some practical ideas to deal with the crisis situation," he said after meeting Abbas. "There are some positive steps. We hope they will be taken."
Hamas spokesman Fawzi Barhoum said the group would consider the Jordanian king's offer to mediate. Abbas' office said he spoke with the king, but gave no further details.
Sunday night's truce declaration had brought a brief ebb in the fighting. But after nightfall Monday, it escalated.
The heavy fighting began early Tuesday at Gaza's Shifa hospital shortly after a member of the Fatah-controlled intelligence service, escorted by two armed colleagues, arrived with a broken leg, Fatah officials said.
Hamas militiamen guarding the hospital blocked the armed men from entering and attempted to arrest them. When more Fatah forces arrived, they were fired upon, sparking the gunfight, the Fatah officials said.
Hamas accused Fatah of storming the hospital, and said a 23-year-old member of a Hamas police unit was killed. It also said one of its men was kidnapped.
The battle raged for nearly an hour, sending children scurrying for cover as they made their way to school and frustrating hospital staff.
"We as medical staff are unable to do our work ... in these circumstances while they are shooting and bombing everywhere," Dr. Juma Al Saqqa, director of Shifa's emergency department, told Israel's Channel 2 TV.
The fighting later spread to one of the main offices of the intelligence service, which was attacked by mortars and grenades, security officials said.
Hospital officials said two pro-Fatah security men sitting in a parked vehicle were killed in another gun battle and five schoolchildren were wounded by stray gunfire, the officials said.