CHULA VISTA, Calif. -- Two men are putting on their superhero costumes Thursday in response to a string of sexual assaults in the South Bay.

The men aren't faster than any speeding bullet, but they are making their presence felt.

They said their sworn enemy is the man connected to at least three attacks on teenage girls in the Eastlake area of Chula Vista.

Members of the so-called Xtreme Justice League took to the streets of Eastlake Thursday evening.

The men are members of a volunteer crime-fighting group that dress up like superheroes to do good.

On Thursday and Friday, the men will be passing out fliers and offering a $1,000 reward for information on the sexual assault suspect, who took off on a skateboard in three of the attacks.

A fourth attack has not been tied to the same person, police said.

The men said they hope to be a visual deterrent for crime and an inspiration.

"I think superheroes represent all that is good, and we want to act as a symbol and also empower people," said Mr. Extreme of the Xtreme Justice League. "With our patrols, we hope to make it a safer area."

The group's fliers include a telephone number for tips, which the group will forward to Chula Vista police.

Police said they are not familiar with the group and don't advocate vigilante justice.

However, they did say the more eyes and ears out there, the better.