This morning between 10:00 and 10:15 AM CDT, the President spoke by phone with Prime Minister Netanyahu. He said he understood the Prime Minister's decision to return immediately to Israel to deal with today's events. They agreed to reschedule their meeting at the first opportunity. The President expressed deep regret at the loss of life in today's incident, and concern for the wounded, many of whom are being treated in Israeli hospitals. The President also expressed the importance of learning all the facts and circumstances around this morning's tragic events as soon as possible.
Barack Obama, Readout of the President's Call with Prime Minister Netanyahu of Israel Online by Gerhard Peters and John T. Woolley, The American Presidency Project https://www.presidency.ucsb.edu/node/290293