Israeli airstrikes killed two Hezbollah fighters in southern Lebanon, the military said on Tuesday, as air raid sirens sounded in northern Israel.

Lebanese Hezbollah and the Israeli military have been exchanging fire across Lebanon's southern frontier in parallel with the Gaza conflict.

Hezbollah on Tuesday confirmed the death of one of its fighters, Hussein Azkoul, but provided no further details.

Two security sources close to Hezbollah said Azkoul was an engineer in Hezbollah's aerial defense units and that he had been active in Hezbollah's field operations.