A top US diplomat said on Sunday Washington was worried about Syrian interference in Iraq, Lebanon and the conflict between Israelis and Palestinians, and said Damascus did not seem to be heeding US calls to keep out. David Welch also told reporters in Cairo that this month's release of a UN report on the assassination of Lebanese prime minister Rafik al-Hariri would probably be an occasion for the world to send a signal to Syria about its "misbehaviour". "Our worries are not just with respect to the situation in Iraq but also with respect to Syrian interference in Lebanon and its renewed interference in the situation of the Palestinians and the Israelis," said Welch, who is US assistant secretary of state for Near Eastern affairs. "These are very, very difficult issues, and we would ask the Syrian government not to interfere in such matters. It appears they are not listening and it seems that this behaviour is not changing," he said after talks with Egyptian President Hosni Mubarak.