An 18-year-old man was shot dead in a suburb of Stockholm late on Wednesday, police said.

Hours later one man was killed and another injured in a shooting in Jordbro, south of the city.

And early on Thursday morning, a 25-year-old woman died after an explosion in Uppsala, west of Stockholm. Police believe she was not the intended victim.

The blast was so powerful that it damaged five houses, tearing the facade off two.

Although it is not yet known whether the incidents were related, local media say at least two of them were linked to gangs.

They bring the number killed in gun violence to 11 so far this month - making it the deadliest for shootings in the country since records began in 2016.

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Gang crime, particularly between two rival groups in Stockholm, has escalated in Sweden in recent months.

One is run by a Swedish-Turkish dual national who lives in Turkey and the other by his former second-in-command.

The feuding sides have been fighting over guns and weapons, according to Swedish broadcaster SVT.

Three people have been arrested in relation to the Jordbro shooting, as well as two others over the Uppsala explosion.

Earlier this week there were two other explosions at properties in central Sweden, which injured at least three people and damaged buildings. Investigations are ongoing.

Sweden's government is increasing sentences for possession of explosives without a permit from three years in prison to five.