Henrik Landerholm left behind documents at a hotel, a phone at an embassy and a notebook after a radio interview

Sweden’s national security adviser has announced his resignation as police opened an investigation after he inadvertently left classified documents at a hotel, one of a series of mishaps that Swedish media have revealed in recent weeks.

Henrik Landerholm, whose appointment two years ago sparked debate due to his longstanding friendship with the prime minister, Ulf Kristersson, also left a notebook behind after an interview and left his phone at the Hungarian embassy, incidents particularly embarrassing given his sensitive national security role.

Authorities have arrested dozens of people accused of taking advantage of the chaos in Syria to settle old scores

Fighters affiliated with Syria’s new leaders have carried out 35 summary executions over 72 hours, mostly of Assad-era officers, a war monitor has said.

The authorities, installed by the rebel forces that toppled longtime president Bashar al-Assad last month, said they had carried out multiple arrests in the western Homs area over unspecified “violations”.

Putin ally comfortably wins vote that US and EU have said could not be free or fair

Alexander Lukashenko has secured a seventh five-year term as Belarusian president in a resounding election victory that western governments have rejected as a sham.

Lukashenko won 86.8% of the vote in Sunday’s election, according to results published by the country’s electoral commission.

The 70-year-old former collective farm boss has been in power in reclusive, Moscow-allied Belarus since 1994

Belarusians began voting on Sunday, with president Alexander Lukashenko expected to cruise to victory unchallenged for a seventh term, prolonging his three-decade authoritarian rule.

Lukashenko – a 70-year-old former collective farm boss – has been in power in reclusive, Moscow-allied Belarus since 1994.