It concerns a man and a woman aged 25.
They are charged with attempted murder, possession of a hand grenade and having caused an explosion in a kiosk on Østerbro in Copenhagen on Tuesday.
No one was injured in the explosion.
Arrested at the bridge
They were arrested at the Öresund Bridge on the same day, and on Thursday they were extradited to Denmark, where they are now in custody.
Both deny wrongdoing. They will be in custody until September 2.
Several Swedes have been detained in Denmark for a short time, this case is the fourth in a week where Swedish citizens are involved.