Man charged over WA homemade bomb blast

A man has been charged by West Australian police with allegedly detonating a homemade bomb on a busy street in Perth's inner-north.

Police say the improvised explosive device was ignited in an area between two restaurants on Newcastle Street in Leederville about 1.30pm on Thursday.

"The explosion caused shrapnel and debris to cover a distance of about 10m," WA Police said in a statement on Friday.

"No one was injured in the incident and the item appeared to be a homemade, makeshift device that had been ignited. The remnants of the device were seized by police for forensic examination."

Police were then called on Thursday night to Perth's city centre where a person reported they were in possession of a similar device.

They said they had taken the device from a vehicle belonging to a person they knew.

Tactical response group officers attended and confirmed it was a homemade bomb similar to the one that had been detonated earlier in the day.

Detectives on Friday raided a home in Queens Park and took a 29-year-old man into custody.

He has since been charged with unlawfully causing an explosion and possessing explosives under suspicious circumstances.

The man has been refused bail and is due to face Perth Magistrates Court on Friday.

"Perth Detectives would like to speak to a member of the public who they believe was in the vicinity of the incident in Leederville," WA Police said.

"It is believed a woman was in that area between 1.30pm and 1.45pm yesterday and may have information that could assist with the investigation."