An elite IDF unit operating Tuesday morning in the West Bank killed an Al-Aksa Martyrs Brigades commander in Jenin as he was planting explosives to use against the troops.
The commander's accomplice was also shot and wounded, while several other Palestinians were hurt in the operation that sparked off heavy exchanges of fire.
Later, a booby-trapped car with a 12 kilogram bomb set by the group exploded in the town about 200 meters from troops, but no one was wounded.
IDF sappers then performed a controlled explosion on another car filled with explosives weighing 24 kilograms.
Troops then neutralized a third explosive devise, which was set to be detonated by means of a telephone.
Following the expiration on Tuesday morning of the deadline issued by Gilad Shalit's kidnappers the previous day, the IDF pressed ahead with its ground offensive in the northern Gaza Strip.
Meanwhile, a Hamas operative was killed and several others were wounded in an IAF air strike in Beit Hanoun in northern Gaza on Monday night.
The Hamas man, Ismail al-Masri, 19, was a member of the Izzadin al-Kassam, the group's military wing.
A short while later, IAF aircraft hit a building at the Islamic University in Gaza City. Black smoke rose from the building, set on fire in the attack. No one was hurt.
The university is considered a Hamas stronghold. The building, where the Hamas-dominated student council meets, was heavily damaged.