In the wake of another attack, Denver Police are warning about a series of aggravated street robberies in the Capitol Hill area.

The attacks are targeting white or Latino pedestrians between the hours of 10 p.m. and 3 a.m., police said.

The most recent incident occurred Thursday night at about 11:30 p.m. in the 1400 block between Humboldt and Lafayette Streets.

In that incident, a group of eight to 10 black men assaulted and robbed three white men.

No arrests have been made in that incident.

However, over the last week, Denver Police say they have arrested seven suspects involved in three separate robberies.

This is the second alert police have issued this month.

On July 19, police issued a Crime Stoppers alert after two couples were robbed by groups of four-to-five young men armed with baseball bats. One attack occurred June 26 near the 1000 block of Broadway and the second occurred July 16 near East 10th Avenue and Pennsylvania Street.

Denver Police spokesman, Sonny Jackson, said Friday the department is conducting special operations as part of the investigations of the robberies, and have enlisted the help of the department’s gang unit.

“We don’t know if they’re gang related, because we haven’t arrested all of them yet,” Jackson said.

“But it’s a possibility. Based on the nature of the attacks and the descriptions of the suspects, we are working closely with the gang unit.”

The police department has also enlisted the help of Taxies on Patrol to be on the lookout for any new incidents.

Several of the arrests were made after one of two Tuesday assaults, in which a man reported being robbed and beaten by a group of black men in the 1000 block of Grant Street.

Police had “saturated the area” because of previous attacks and officers spotted a group of young men and women at Civic Center, who ran when officers approached.

Police caught and questioned eight of them, including four who were arrested in connection with the Grant Street robbery: Ashley Howard, 18, Leonard Walters, 19, Rodney Mitchell, 19, and a juvenile male.

Their booking photos have not been released as investigators show photo lineups to other victims or witnesses

According to court records, Mitchell had a previous arrest this year in April. A district attorney at the time dismissed a felony charge for aggravated robbery with a deadly weapon, when Mitchell plead guilty to a misdemeanor charge of third degree assault.

Mitchell was sentenced to two years probation at that time.

He is being held on no-bond for the violation of probation, and has a $7,500 bond for the new charges.

Howard and Walters both remain in custody also, with $5,000 bonds.

Anyone with additional information on these crimes is asked to contact the Denver Police Department at 720-913-2000, or Crime Stoppers at 720-913-7867. A reward of up to $2,000 is possible is information leads to an arrest.