CLEVELAND, Ohio -- A large pack of people riding dirt bikes, motorcycles and ATVs was causing problems Sunday night in Cleveland and surrounding suburbs, reportedly ignoring traffic and efforts by police and the State Highway Patrol to have the riders stop.

Lakewood police say there were more than 100 riders in the pack. Some went onto sidewalks and tree lawns and were doing stunts such as wheelies.

An undetermined number of arrests were made in Lakewood, police say. There also was at least one crash in Cleveland involving a bike rider. The rider was taken to MetroHealth Medical Center in unknown condition.

People on Twitter were posting videos of the riders as they went through neighborhoods and downtown Cleveland, including the Flats, and on area highways.

Troopers with the State Highway Patrol were unavailable to comment Sunday night.

Cleveland has been trying to curtail illegal dirt-bike riding in recent years.

Initial reports about the large pack of riders came in around 8 p.m. in Lakewood, according to NE Ohio Scanner:

Lakewood: Approx 60 dirbikes westbound on Clifton, driving all over, turfing lawns refusing to stop for PD or red lights. — NE Ohio Scanner (@NEO_Scan) August 13, 2018

Several additional posts followed from NE Ohio Scanner and others. Sightings of bikers were still being reported as of 9:40 p.m.:

No visible license plates. Mostly black males. Approaching Rocky River. https://t.co/fDkoA1dqGr — NE Ohio Scanner (@NEO_Scan) August 13, 2018

Riding on both sides of Lake Rd, including into oncoming traffic. Bay Village and Avon Lake PDs also advised. https://t.co/N1Asgybzb0 — NE Ohio Scanner (@NEO_Scan) August 13, 2018

Some of them now headed back eastbound in Lakewood, some headed southbound on Clague. https://t.co/LZoL0h3hpy — NE Ohio Scanner (@NEO_Scan) August 13, 2018

OSP has been called, and is joining the pursuit. https://t.co/1AeJs4MRxv — NE Ohio Scanner (@NEO_Scan) August 13, 2018

Cleveland is not sending help to Lakewood, they have dirt bikes and ATVs all over the place apparently. https://t.co/uFqWZdYIYf — NE Ohio Scanner (@NEO_Scan) August 13, 2018

OSP has chased some of them to the projects, E 37 & Woodland https://t.co/64lshVMNo8 — NE Ohio Scanner (@NEO_Scan) August 13, 2018

Rider down fell off an ATV on Huron. Cleveland FD/EMS en route. https://t.co/Yvh8Xgm4IL — NE Ohio Scanner (@NEO_Scan) August 13, 2018

@NEO_Scan Driver of ATV bailed at Clague and Lake. Bay Village pic.twitter.com/onrbmfOmMD — H-6 Photo (@H6_Photo) August 13, 2018

Here they are riding through the flats and the warehouse district. pic.twitter.com/XB4O31dhDq — Jamie (@DunfordJ70) August 13, 2018

OSP still chasing some around in the area of Harvard & Broadway https://t.co/9qCL8GW8Z1 — NE Ohio Scanner (@NEO_Scan) August 13, 2018

Came right over my house on the bridge over the Yacht club deafening noise police cars sirens. — Pam Baron (@pambaron) August 13, 2018

They were in lakewood earlier pic.twitter.com/a29ePpu5Yf — Brigy Bryant (@brigidbryant127) August 13, 2018