Israeli air force have struck Hamas bases in Gaza. File photo/AFP

Israeli forces bombed Hamas targets in the Gaza Strip overnight in retaliation for Palestinian rocket attacks, the military said on Thursday.

Hamas launched two rockets at Israel late on Wednesday — bringing to six the number of strikes from Gaza in less than a week — the army said, adding that they caused no casualties or damage.

In retaliation, the army said it “struck “a number of military targets in a Hamas naval facility in the northern Gaza Strip.”

A Palestinian security source told AFP a naval base west of Gaza City had been “targeted several times” by Israeli aircraft.

The source said aircraft had also targeted “three sites in the central Gaza Strip and in Khan Yunis” in the south.

He reported no casualties.

There have been a series of deadly incidents along the Gaza border since the start of the month.

On Sunday, the three Palestinians were killed by Israeli soldiers in the northern Gaza Strip.

Regular mass protests began along the Gaza-Israel border in March last year demanding the easing of Israel's more than decade-old blockade of the territory and the right for Palestinian refugees to return to their ancestral homes in what is now Israel.

At least 305 Palestinians have been since been killed by Israeli fire, the majority during demonstrations.

Agence France-Presse