Three men were on Saturday in police custody after being arrested by armed police at London's Heathrow airport on suspicion of making a bomb threat.
Officers boarded the Emirates flight, bound for Dubai, after a "verbal threat was made to staff" as the plane was taxiing shortly before take-off late Friday, London's Metropolitan Police said.
Three men aged 58, 48 and 36 were held but a search of the plane, which was carrying 331 passengers, uncovered nothing suspicious. The airliner has now been handed back to Emirates.
"They have been arrested on suspicion of making a bomb threat," police added.
Sky News television reported that the men arrested were English and appeared to be drunk. The airport -- the world's busiest international air hubs -- remained open during the incident.