Israeli fighter jets bombarded the southern Gaza city of Khan Younis on Tuesday evening in an attempt to kill Mohammad Sinwar, one of Hamas’s remaining top leaders in the enclave, according to two Israeli military officials.

Both officials spoke on condition of anonymity because they were not authorized to speak publicly.

Around the same time, the Israeli military said its forces had struck a Hamas command center underneath the European Hospital, near Khan Younis. An Israeli military spokeswoman declined to say whether Mr. Sinwar was targeted in that strike.