Two "suspected devices'' were also discovered at the house in Kirkton Avenue, Blantyre, South Lanarkshire, on Wednesday.
Katy Perry Announces Scottish Date In Witness World Tour
Katy Perry will bring her Witness tour to the UK for seven shows in 2018.
The Chained To The Rhythm singer will play The O2 in London on June 14 before gigs in Birmingham, Sheffield, Liverpool, Manchester, Glasgow and Newcastle.
She announced the European tour dates on Twitter, writing: ''HELLO, HALLO, CIAO, BONJOUR! I can't wait to (see) you, UK/Europe! Tickets on sale Friday 9 June,'' followed by a string of flag emojis.
The message was accompanied by a video showing highlights from her live show.
Perry will join Ariana Grande and a string of other big stars including Justin Bieber, Miley Cyrus and Coldplay for the One Love Manchester benefit gig for the victims of the Manchester terror attack this Sunday.
She will also play Glastonbury later this month, taking to the stage before The National and Foo Fighters.
The Witness tour starts in Columbus, Ohio, on July 7, with the European leg kicking off in the German city of Cologne on May 23 next year.
Police Scotland said the officer had approached an Audi A4 to speak to the occupants when it was allegedly driven at him.
Audit Scotland's annual review of the sector found there were 220,680 students by headcount in 2015/16, the smallest number since 2006/07.
Fondly known as The Big Yin, he will be recognised for his contribution to society at a university graduation ceremony in the Barony Hall in Glasgow on Thursday.
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