Israel threatens Gaza ground invasion despite truce efforts

An Israeli artillery unit fires toward targets in Gaza Strip, at the Israeli Gaza border, Thursday, May 13, 2021. (AP Photo/Ariel Schalit)

JERUSALEM — Israel on Thursday said it was massing troops along the Gaza frontier and calling up 9,000 reservists ahead of a possible ground invasion of the Hamas-ruled territory, as the two bitter enemies plunged closer to all-out war. Egyptian mediators rushed to Israel for cease-fire efforts but showed no signs of progress.