The home of a Democrat politician who was “assassinated” has been broken into and searched, police have said.

Melissa Hortman, the late Democrat speaker of Minnesota’s House of Representatives, was killed on Saturday alongside her husband by a gunman masquerading as a police officer.

Minnesota governor Tim Walz said the killings appeared to be a “politically motivated assassination”.

Police were alerted to an overnight break-in at 8am on Wednesday at Ms Hortman’s home, where she was killed, a Brooklyn Park Police spokesperson said.

A window at the back of the house had been broken and plywood used to board it up had been pried off, police said.