(Updates casualties)

GAZA, May 14 (Reuters) - The Israeli military killed two Hamas militants and two Palestinian civilians on Wednesday in the Hamas-controlled Gaza Strip, medical workers said.

A gunman was killed by an Israeli air strike during a ground raid near Khan Younis, in the southern part of the territory, the medical workers said. An Israeli military spokeswoman confirmed the strike.

Separately, Israeli soldiers shot dead an 18-year-old Palestinian during an incursion near Jabalya refugee camp in the northern Gaza Strip, the medical workers said.

An Israeli air strike in the northern Gaza Strip killed a Hamas gunman and a civilian, medical workers said. The military spokeswoman said she was checking the report.

Israel frequently raids the coastal enclave in what it calls an effort to stop cross-border rocket attacks.

Egypt is mediating a ceasefire agreement between Israel and Hamas in the Gaza Strip, but progress has been stalled by disagreement over the scope of the truce. (Reporting by Nidal al-Mughrabi; Writing by Joseph Nasr; Editing by Keith Weir)

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