The international Stockholm Skavsta Airport in Sweden was reportedly closed and evacuated on Sunday following a terror alert.  It was subsequently reopened at 2 pm local time following a nod from the police, according to an official statement on the airport's website.

The local police said traces of explosive powder were detected on a piece of luggage belonging to an elderly passenger.

A bomb disposal team was called into the airport following the discovery as the luggage was being screened by airport security on Sunday morning, said a Mirror report.

However, the woman on whose bag the traces were found claimed she doesn't know how it got there, according to the report.

A regional newspaper said the police suspect the powder to be explosive or inflammable. Another tabloid quoted Duty officer Roland Lindkvist as saying that the elderly passenger was cooperating with the authorities.

"There are no known threats to the airport and we have no reason not to trust the person in question," the Mirror report quoted Lindkvist as saying.

He was also quoted in a Daily Mirror report as saying: "The baggage and departure halls were evacuated, which has affected departing flights but not arrivals."