Israeli shellfire killed a Palestinian militant and wounded another in the Gaza Strip early on Wednesday, Palestinian medical officials said.

The shelling, near the southern Gaza town of Khan Younis, followed an upsurge in violence this past week along Israel's border with the Hamas-ruled territory, and followed a clash on Tuesday along the Israeli border with Lebanon.

The Israeli military had no immediate comment on the Gaza violence. Israeli troops often open fire at suspects approaching a heavy-fortified border zone along the frontier between coastal Gaza and the Jewish state.

Palestinian medics said one militant was killed and at least one other wounded in the pre-dawn Israeli strike. Ambulances were still searching the area for more casualties.

A Hamas commander was killed in an Israeli air strike launched on Friday after a rocket fired from Gaza struck in the southern Israeli city of Ashkelon, causing no casualties but damaging property.

The Israeli-Gaza border had been largely quiet since a three-week war that ended in 2009.

In the earlier violence with Lebanon, a senior Israeli officer, two Lebanese soldiers and a Lebanese journalist were killed in the worst bloodshed since a 2006 war, raising concerns new fighting may erupt between Israel and Hezbollah guerrillas.

Hezbollah and Hamas are supported by Iran whose Islamist government has been subjected to Western economic sanctions aimed at pressuring Tehran to curb a nuclear program.