Clashes in Jerusalem that raised tensions during the Muslim holy month of Ramadan spilled over into Sunday, resulting in 18 arrests and placing Israel’s coalition government under even more duress.

Following a visit by Jews to a disputed holy site, Israeli riot police clashed with Palestinians flinging fireworks through the passageways of the walled Old City.

When stone-throwing Palestinians damaged the windows of two buses, some passengers were lightly injured. Also targeted was a small number of Jewish worshippers.

The clashes on Sunday were less violent than those that occurred two days earlier at Jerusalem’s Al-Aqsa mosque compound, but they were enough to prompt a small but influential Arab party to reconsider its membership in Israeli Prime Minister Naftali Bennett’s ruling coalition, which no longer has a majority in parliament.

The United Arab List, the country’s first Arab party to join an Israeli government, said it was suspending its participation in the cabinet over Israel’s handling of the Al-Aqsa violence and would consider withdrawing if things did not improve.

Bennett’s coalition holds 60 of parliament’s 120 seats, including four from the United Arab List.

Some political analysts believe the statement was merely a symbolic effort to relieve pressure on party leaders during the crisis, which they believe will be addressed by the time parliament reconvenes next month.

East Jerusalem, which Israel took in a 1967 conflict and which Palestinians want to make the capital of a future state, contains the Old City.

Tensions over Jerusalem sparked an 11-day battle in the Gaza Strip last May between Israel and Hamas Islamist terrorists.

Bennett’s razor-thin parliamentary majority was slashed this month when a member of his nationalist party resigned.

Meanwhile, the Palestinian Health Ministry said that two Palestinian males were gravely injured by Israeli forces in the occupied West Bank on Monday, the latest episode in a wave of recent violence.

When scores of Palestinians began throwing rocks and bombs at Israeli troops conducting an arrest operation in the village of Yamun, west of Jenin in the northern West Bank, the troops fired fire.

“The soldiers responded with live ammunition toward the suspects who hurled explosive devices. Hits were identified,” the army said in a statement.

The two wounded men were hospitalized, according to the official Palestinian news agency Wafa.