The Winnipeg Police Association says the number of officers assaulted in the city has risen by almost 64 per cent over the last 10 years.

"Winnipeg is, again, sort of the head of the spear as we are in many other violent crime categories," said Mike Sutherland, president of the WPA.

Assaults against officers have increased across Canada, with the biggest jump seen in Winnipeg, said Statistics Canada.

On Wednesday night, four officers were assaulted while responding to calls over a 12-hour period.

One officer had his hand broken by a suspect, while another was punched in the eye.

In 2009, 221 officers were assaulted, said police officials.

An organization that helps convicts reintegrate into society said the rise of officer assaults could be a result of the city's in-your-face policing.

"If police officers are going to be more aggressive in how they approach people on the street it's a natural response. People are going to be more aggressive when they respond to the police," said John Hutton from the John Howard Society.

Police said on Friday that officers are trained in use-of-force and are also given tactics to de-escalate situations that have the potential to turn violent.

Sutherland also said the only way to help curb assaults against officers is to put into place harsher penalties for offenders.

So far in 2010, 140 officers have been assaulted in Winnipeg, said the WPA.

- with a report from CTV's Caroline Barghout