D.C. residents are bound to see more off-road vehicles such as ATVs this summer. Here's why the trend is a problem. (Claritza Jimenez/The Washington Post)

D.C. police said they have arrested at least 27 people for operating illegal dirt bikes in the District since a crackdown began in early April. In addition, police said they have seized more than 30 of the off-road vehicles.

The statistics were announced Tuesday as police described an arrest made after a recent collision of two all-terrain vehicles on Minnesota Avenue SE. They said the driver of one vehicle noticed a police car, tried to flee and drove into the other vehicle. One ATV was confiscated, police said, and the operator was charged with illegally operating a dirt bike; the other driver fled.

Police in the District, Baltimore and area suburbs have long battled what they call a scourge of out-of-control operators of all-terrain vehicles and dirt bikes who take over roads, ignore traffic controls and scare and sometimes harm residents.

On Friday in Baltimore, police said an 18-year-old from Fairfax County walking to a Beyoncé concert was struck by an ATV as a pack of riders raced along Pratt Street at the city’s Inner Harbor, which is popular with tourists. Police said that none of the riders stopped and that they were being sought.

The teen suffered a fractured skull, her father said, and will miss her graduation on Saturday from W.T. Woodson High School as she recovers in a hospital. “It sounds like they were out of control,” said the young woman’s father, Tim Coffman, 58. “They didn’t care whether she was injured or not.”

That same evening in a different part of Baltimore, police said a motorist accidentally struck a dirt-bike rider and was beaten by the rider’s friend.

Nearly all police jurisdictions in the Washington and Baltimore areas forbid officers to pursue illegal dirt bikes and ATVs, saying it is too dangerous. Several jurisdictions, including the District, offer rewards to people who help locate off-road vehicles and identify operators. In April, D.C. police published photographs of 245 riders from the District, Maryland and Virginia, and urged the public to help to identify them. The arrests and confiscations announced Tuesday in the District are a result of that initiative.

“The vehicles are extremely dangerous to pedestrians and other motorists,” Capt. Michael Pavlik of the D.C. police said in a statement.

Coffman, the father of the teen injured in Baltimore, said his daughter had just eaten dinner with friends and was headed to the concert at the nearby M&T Bank Stadium, home of the Baltimore Ravens. She was struck on a street that runs by the harbor and is typically crowded with pedestrians and vehicles.

Coffman, a juvenile probation officer in Arlington County, praised Baltimore police for helping his daughter, who never made the concert, but he said he would not recommend returning.

“I think the city needs to understand they have a crisis,” he said, referring to the dirt bikes. “They invite people into their city to a concert, and people need to feel safe. I’ll never feel safe there. . . . How is this allowed to happen? There are laws we’re expected to follow, and it seems like these guys are operating outside the law, putting people in jeopardy.”

He didn’t want his daughter’s name published, but said she remains at the Maryland Shock Trauma Center in Baltimore. He said it appears she will make a full recovery.