The Israeli military said it was conducting extensive strikes on Hamas targets in Gaza while medics there reported casualties in a series of the most violent airstrikes since the January 19 ceasefire began.
The army did not provide more details about the strikes.
Three houses were hit in Deir Al-Balah in central Gaza, a building in Gaza City, and targets in Khan Younis and Rafah, according to medics and witnesses.
The escalating violence comes amid disagreement between Israel and Hamas on how to sustain the three-phase ceasefire that began in January.
Arab mediators, backed by the United States haven't been able to hammer out differences between the two warring parties in talks held over the past two weeks.
