A large explosion struck a Hamas compound in central Gaza City on Thursday, Palestinian witnesses said.
The cause of the blast wasn't immediately known, and there was no word on casualties. Israeli military officials were not immediately available for comment.
Israel has threatened "harsh" action in response to repeated Palestinian rocket attacks.
US President Joe Biden and Iraqi Prime Minister Mustafa Al Qadimi signed an agreement on July 26 to formally end the USA's military presence in the country by the end of the year