SEOUL - Two airplanes that were being towed collided at an airport in Gimpo in western Seoul, causing damage to part of the jets and a four-hour delay in their take-offs, South Korean authorities said on Tuesday (June 26).

A Boeing 777 Korean Air plane hit its tail against a wing of an Airbus 330 Asiana Airlines plane in the apron of the International Terminal of the Gimpo International Airport at around 8am, reported Yonhap news agency.

No passengers were aboard either of the planes when the incident happened, they said.

There were two mechanic workers on each and neither of them were hurt.

The Korean Air plane was bound for Osaka and the Asiana Airline flight was set to head to Beijing.

Airport authorities said they are looking into the exact cause of the accident, including possible careless handling of the towing vehicles that were moving the planes, reported Yonhap.

The collision also delayed the departure of other flights, the authorities said.

Many cities across the country expected to see significant rainfall throughout Tuesday (June 26), with heavy rainfall warnings issued in Seoul and parts of South Chungcheong province.

The Korea Meteorological Administration have issued advisories to urge people to take extra care as many parts of the country will see over 120mm of rain, accompanied by strong winds, thunderstorms and lightning.