Barack Obama and Egyptian President Mohamed Mursi have agreed to stay in close contact during the coming days, report the Reuters news agency.
Obama called Mursi to commend the country's efforts in helping to diffuse the situation in Israel and Gaza, the White House said.
Hisham Kandil, the Egyptian prime minister, has said that Cairo is prepared to mediate a truce in the violence between Israel and Hamas.
Today's bombing in Tel Aviv is reminiscent of six years ago and could mark a serious escalation in the conflict.
A truce in Gaza suits all sides but none of the groups seem interested in a long-lasting solution.
A complex system of air defences has been instrumental in protecting Israel's population from incoming rockets.