• A World War II bomb was found near the runway of London City Airport on Sunday.
  • The airport closed on Sunday and Monday, with hundreds of flights canceled.
  • The British Royal Navy dragged the bomb down the Thames overnight and plans to detonate it in the middle of the sea on Wednesday.

The Royal Navy has dragged an unexploded World War II bomb down the River Thames overnight and plans to detonate it at sea on Wednesday.

The bomb – a 500-kilogram tapered-end shell, measuring about 1.5 meters, or 4.9 feet, long – was discovered buried in dense silt near the runway of London City Airport on Sunday morning.

The airport closed Sunday night and though Monday so the London police and a Royal Navy bomb-disposal team could remove the device. Hundreds of flights were canceled, disrupting some 16,000 people’s travel plans.

The bomb-disposal team removed the bomb with a lifting bag and dragged it down the Thames overnight to Shoeburyness, a coastal town 60 kilometers east of the bomb’s original location, a Royal Navy spokeswoman told Business Insider.

The unexploded ordnance is now at a military range in the sea off Shoeburyness, Essex. The navy plans to attach high-grade military detonators to blow it up.

The bomb-disposal team originally wanted to detonate the bomb on Tuesday. It has since postponed the operation to Wednesday because of poor weather conditions, the Royal Navy said.

Cmdr. Del McKnight of the Royal Navy's fleet diving squadron said in a statement on Tuesday: "The bomb presents no risk to the public in its current location, so we will leave it where it currently sits until tomorrow."

london city airport bomb shoeburyness

Foto: The British Royal Navy is transporting a World War II bomb down the Thames from east London to Shoeburyness, east England (rough rendering). source Google Maps/Business Insider

london city airport bomb disposal boat

Foto: Royal Navy bomb-disposal experts in the Thames. source Crown Copyright

The area where the airport stands used to be an industrial center, and it came under heavy bombardment from German planes during the war. Unexploded bombs still occasionally turn up during construction work.

London City Airport operates flights to and from the UK and Europe as well as New York. More than 4.5 million people used the airport last year.