4:15 p.m. The wreck causing a slowdown on Interstate 35 apparently was caused by rubberneckers distracted by an Oklahoma County sheriff's deputy who had pulled over a motorist, officials said.
Mark Myers, a spokesman for the sheriff, said a deputy pulled over a vehicle on I-35 northbound near Danforth in Edmond. Two cars then collided as they passed.
Oklahoma Highway Patrol Trooper Betsy Randolph said there was one minor injury in the wreck, which has slowed traffic for miles on the northbound lanes. Randolph said traffic likely will remain backed up for some time as authorities clear the wreck from the roadway.
3:55 p.m. An injury wreck on Interstate 35 near Danforth has caused a major backup on the highway's northbound lanes.
An Oklahoma Highway Patrol spokesman had few details about the wreck, which happened about 3:45 p.m. Traffic was backed up for miles because of the wreck.
Check back with NewsOK.com for more information.