BOULDER, Colo. -- Boulder city council members have condemned a series of recent attacks in the city over the past ten days.

“We will not tolerate these types of crimes in our community,” said mayor Shaun McGrath.

“We will do what ever we can to find the perpetrators and try to avoid these kinds of attacks from happening,” McGrath said.

The Boulder City Manager updated the council on recent attacks, including the sexual assault of a woman who was walking home from a Halloween party. Boulder police believe four men may have been involved in the assault, which occurred in an alley near 15th St. and Arapahoe St.

Another case earlier in the day involved an Asian-American man who was attacked in what police are investigating as a possible bias-motivated crime.

Two other women were assaulted in the same time period. Police continue to investigate, and haven’t linked any of the cases at this point.

“If we don’t tolerate it every day, every where we go, then it will stop,” said City Councilwoman Angelique Espinoza.

“The climate is very unsafe, people are afraid to walk to their cars, or just walk anywhere,” said Detre Godinez, Director of the Bias Hotline Project.

Godinez, who spoke to 7NEWS after testifying in front of the city council Monday, said the Bias Hotline receives information about crimes that aren’t necessarily reported to police.

“There were also incidents of women being harassed; not feeling safe,” Godinez said.

“We condemn these acts of violence,” said City Manager Judy Brautigam.

“Boulder police are giving their full attention to solving these crimes,” said Brautigam, who added advocates are working with victims, and police patrols have been stepped up in certain areas.

In January of 2007, the Boulder city council passed an ordinance increasing the sentences for bias-motivated crimes.

Brautigam told council members the number of such crimes has gone down 40 percent compared to last year.

“But one is too many,” Brautigam said.

Several groups attending the council meeting also encouraged participation in an upcoming march and rally.

Audrey Fishman Franklin, chair of Boulder Community United told the council the events included, “interactive opportunities to learn, grow, and overcome recent acts of violence and hatred that have occurred here,” Franklin said.

The march is scheduled to begin Thursday, Nov. 20 at 6 p.m. at the Library Auditorium.

The events are called, “Journey to Justice,” and includes participation by the Anti-Defamation League, Rocky Mountain Peace and Justice Center, The Bias Incident Hotline and Boulder Pride.

“We want to be at the forefront of President-elect Obama’s challenge to work along with him to make positive change in our country,” Franklin said.

The Bias Incident Hotline number is 720-936-0555.