JERUSALEM – Israeli soldiers shot and killed two Palestinians in street clashes in a West Bank refugee camp on Monday, and traded fire with Lebanese troops in a separate incident along Israel’s northern border.

Residents at the Qalandiya refugee camp north of Jerusalem said that soldiers raided the camp in the early morning hours, intending to make arrests, and opened fire when they were surprised by a crowd of stone-throwing youths. Many residents were awake in anticipation of the pre-dawn meal and prayers on the first day of the Muslim holy month of Ramadan.

The gunfire killed two young men, identified as Mu'tasim Adwan, 22, a law student, and Ali Khalifeh, 26, a member of the Palestinian security forces. Another man was seriously wounded, and he and two others were arrested, according to a statement issued by the Palestinian Authority.

An Israeli army spokeswoman said that five soldiers were hurt in the clashes, and that the army was investigating the incident. She confirmed that three men had been arrested in the raid.

On Israel’s tense border with Lebanon, troops briefly exchanged fire in a rare clash between the two armies. There were no casualties.

An Israeli military official said that soldiers on patrol who had crossed a frontier fence in Israeli territory were fired upon by Lebanese troops, and returned fire. A Lebanese military official said that the Israelis had entered Lebanese territory.

Israeli army officials said they wanted to maintain calm along the frontier, where a strained quiet generally prevails.

In the most recent incident in the area, seven protestors were killed in May when Israeli troops opened fire on demonstrators marching on the Lebanese side of the border fence and hurling stones and firebombs.