An Alitalia flight that was preparing to leave Rome's main airport for London was evacuated Saturday after officials received an anonymous phone call announcing there was a bomb on the plane, but police later said it was a false alarm, AP reported. The 165 passengers were evacuated and baggage was unloaded, as bomb-squad officers using sniffer dogs verified there were no explosive devices aboard, police at the capital's Fiumicino airport said. The alert was launched at 1:15 p.m. (1115GMT), just 20 minutes before the flight was due to leave. The plane took off later Saturday, with a 4½-hour delay.