An injured woman is wheeled into a Gaza City hospital following Israeli air strikes early on Tuesday [AFP]

One person has been killed and five others have been wounded in Israeli air strikes on the Gaza Strip, according to Palestinian medical sources.

The first raid, early on Tuesday, targeted Zeitun, east of Gaza City and injured three men involved in firing rockets at Israel, the medical sources told the Reuters news agency. One among them later died.

The warplanes also targeted two Hamas training camps, one east of Gaza City and another west of Khan Younis city.

Two people were reported to have suffered minor injuries, according to the AFP news agency, which carried images of an injured women arriving for treatment at a Gaza City hospital.

Three Palestinian civilians, among them a boy, were injured, sources said, in a separate air strike that targeted a tunnel beneath Gaza's border with Egypt.

In a statement, the Israeli military said the raids were launched in response to the firing of a rocket from the Gaza Strip at the southern town of Beersheva.

Aircraft "targeted four targets in the Gaza Strip. Direct hits were confirmed," the statement said. 

An Israeli police spokesman said a rocket had been fired at Beersheva, without causing casualties. Israeli public radio said a second rocket was also fired at the town, but it was not known where it fell.

Since last month there has been an increase in the number of rockets fired at southern Israel from the Gaza Strip followed by Israeli air force reprisal raids after several months of calm following a flare-up in April when an anti-tank missile hit an Israeli school bus, killing a teenager.

Israel responded to that attack with a series of air strikes that killed at least 19 Palestinians in the deadliest violence since Israel's devastating 22-day assault on Gaza in December 2008-January 2009.

Source: Al Jazeera and agencies