Operations at Singapore’s Changi airport have been disrupted by drones for the second time in a week.

Eighteen flights were delayed and seven others diverted due to drones and bad weather, according to the country’s Civil Aviation Authority (CAAS).

One runway was suspended at Changi and dozens of flights delayed after drone sightings last week.

CAAS said: “Fifteen departures and three arrivals were delayed and seven flights were diverted due to bad weather and unauthorised drone activities.

“Members of the public are reminded that the authorities take a serious view of errant operations of unmanned aircraft which may pose threats to aviation or endanger the personal safety of others,” the statement said.

The authority added that investigations are “ongoing”.

CAAS warned that offenders could face fines of up to S$20,000 (£11,596) or 12 months in prison.

CAAS said last Wednesday that 37 flights were delayed and one flight was diverted after “confirmed sightings of drone flying in the vicinity of Changi airport,” the BBC reported.

Drone sightings caused travel chaos at Gatwick in December, with about 140,000 passengers caught up in the disruption.

The runway at the UK’s second busiest airport was closed for 33 hours over three days – causing about 1,000 flights to be cancelled or delayed.