Police in Winnipeg are investigating a number of recent assaults.

This morning, an officer was dragged when a truck fled from a traffic stop in the 2500 block of Waverley Street. The blue 2014 Toyota Tacoma double-cab truck had been reported stolen, and police are asking anyone with information to contact them. The Manitoba licence plate is HJW249. The driver is described as caucasian in appearance, wearing a dark-coloured hat and glasses. The officer, a 10-year member of the force, suffered painful but non-life threatening injuries and was taken to hospital in stable condition.

Police also report that last evening a transit supervisor was assaulted by three males while on the job.

"What we know is that an eastbound transit bus was stopped at the intersection of Portage Avenue and Colony. Three males had boarded the bus, however one did not have sufficient funds and was advised of this by a transit supervisor who was on board. All three became verbally aggressive and the supervisor requested that they leave the bus," says Constable Rob Carver.

It's alleged the suspects then began assaulting the supervisor, and dragged him off the bus where they continued the assault. Carver says the assault was interrupted when police officers and cadets happened upon the scene. An adult man and two youths were arrested and released on a promise to appear.

Winnipeg Police also say a 28-year-old woman is accused of punching one security guard and spitting on another at a Portage Avenue shopping centre yesterday evening. Police say it's believed she was high on methamphetamine.

Around midnight yesterday, police say a 31-year-old man believed to be high on meth tried to push over a police officer and resisted arrest. According to police, the encounter began when officers tried to stop the man for riding a bike on the sidewalk in the area of Aikins Street and Burrows Avenue, and he fled into oncoming traffic to an address on Alfred Avenue.

And a 26-year-old man is accused of threatening and throwing a bike at security guards at Health Sciences Centre Wednesday morning.

In total this week, five Winnipeg Police news releases have referenced methamphetamine.

Constable Jay Murray says police train for lots of scenarios, trying to keep people safe, but every situation is different, and he says meth has an unprecedented amount of unpredictability to it.

"Traditionally when we train we tend to have an expectation of how somebody might react when we use certain words, when we try to de-escalate, but it's all thrown out the door when you're dealing with somebody who's high on methamphetamine, and it poses significant challenges," says Murray.