Sunday's missile tests come after the US, Britain, and France revealed Iran's secret nuclear facility, and Israeli Prime Minister Benjamin Netanyahu is urging US lawmakers to act now.
At the UN Tuesday, Obama appeared to drop his demand that Israel freeze settlement growth as a precondition to negotiations by calling on it to “restrain” activity instead.
The UN report, which accuses Israel of committing war crimes, "makes a mockery of history," said Israeli President Shimon Peres.
The US Mideast envoy called the meeting "good" but didn't say whether he discussed a settlement freeze, which Palestinians have called a prerequisite to peace talks.
Some see the Israeli prime minister's demand that Arabs recognize Israel as a Jewish state as a simple quid pro quo, but critics say it's a new obstacle.
The Israeli leader is not likely to suggest radical changes in dealing with Palestinians, analysts say.
Hamas has vowed revenge on Fatah after a shootout between the two factions in the West Bank that left six dead.