GAZA, April 21 (Xinhua) -- Israeli fighter jets on Monday carried out a series of airstrikes across the Palestinian Gaza Strip, injuring two Hamas policemen, witnesses said.
Israeli jets targeted a military base used by militants of the Hamas armed wing in the southern Gaza Strip city of Khanyounis, said the witnesses.
Two other airstrikes hit animal farms and open areas in Nussairat and Dieral-Balah cities in the middle of the Gaza Strip.
A spokesman for Hamas-run ministry of health said two policemen were slightly injured.
Right after the air raids, Hamas security services evacuated their sites across the coastal enclave.
The airstrikes came a few hours after Israel announced that six rockets fired from Gaza landed in its territories.
None of the Palestinian armed groups has claimed responsibility for the rocket attacks.
Earlier in the day, an Israeli army spokesman told the Israel's official radio that an army patrol was fired by Palestinian militants near the fence between Gaza and Israel.
The Hamas-ruled Gaza Strip witnesses sporadic cross-border violence since a cease-fire deal was reached between Israel and Palestinian militants in November 2012.
The Egyptian-mediated truce ended a week of violence that left 184 Palestinians and six Israelis dead.