Hamas’ leader said his group will respond if Israel retaliates too forcefully to an overnight rocket strike.
Protesters at the site said he had been taking part in an overnight rally ahead of the main demonstration scheduled for Saturday afternoon.
Hurling pipe bombs and setting off firecrackers, “Night Disturbance Units” have become a new phenomenon on the Gaza-Israel border in the run-up to the first anniversary of deadly border protests.
Dozens of Palestinians were seen approaching the border fence east of Jabalia in the northern Gaza Strip at around midday (0900 GMT) before retreating as Israeli troops fired tear gas.
King Salman told Arab monarchs, presidents and prime ministers at the meeting that his country "absolutely rejects" any measures affecting Syria's sovereignty over the Golan Heights.
Arab officials said the summit would be dominated by the Golan Heights and Palestinian demands for an independent state in the West Bank and Gaza Strip, areas also occupied by Israel in the 1967 war.
Israeli troops shot and wounded seven Palestinians on the Gaza border on Friday, Gaza medical officials said, the day before a mass rally called to mark the first anniversary of weekly protests in which around 200 Palestinians have been killed.
The Israeli military said troops opened fire after Palestinians threw rocks and explosives at them during an operation southeast of the city of Ramallah.
A Palestinian was killed during a clash with Israeli forces near occupied Jerusalem overnight, the Palestinian health ministry and residents said on Tuesday.