Three bombs sent through the mail in Winnipeg, including one that severely injured a lawyer, were hidden inside small grey voice recorders, court documents show.

Although a suspect was arrested Saturday, police cautioned members of the legal community on Monday to watch out for small white packages with distinctive handwriting because they could not say whether more bombs were sent out.

The three explosive devices have put Winnipeggers on edge, drawing a bomb squad to investigate at least two Canada Post buildings, a law office and City Hall on Monday. No more bombs were found.

Police said the explosive devices were connected to lawsuits involving the suspect’s ex-wife, who is believed to have been one of the targets.

Guido Amsel, 49, was charged Monday with two counts of attempted murder, one count of aggravated assault and several other charges related to possessing and sending explosives.

Court documents show Amsel has been involved in legal disputes with his ex-wife Iris Amsel, who was represented by Maria Mitousis, the family lawyer seriously injured Friday by one of the bombs.

A day after Mitousis was injured, bomb squad robots exploded a second bomb at an automotive business.

On Sunday later, the bomb squad took out a third bomb, at the law firm Orle Barge and Davidson, which was connected to a lawsuit involving the Amsels, according to police.

The Amsels separated in 2004, splitting shares an automotive company they jointly owned, court documents show.

Guido Amsel later accused his ex-wife of taking and hiding more than $3 million from the company.

Mitousis suffered severe injuries on Friday at her office at the firm Petersen King. She has since been upgraded to stable condition, but suffered “extensive upper body injuries,” according to Winnipeg Police Supt. Danny Smyth.

All of the discovered packages are believed to have been sent out on June 29 and June 30, and were delivered on July 2 or July 3, Smyth said.

Winnipeg Mayor Brian Bowman said that first responders’ quick work “likely saved lives and further injuries.”

With a report from CTV Winnipeg and files from The Canadian Press