Two men tried to carjack a motorist in Northeast Washington Wednesday morning by a strategy of using one car to strike another and then trying to steal the vehicle when the distracted driver steps out, according to D.C. police.

Authorities have been investigating a string of carjackings fitting this pattern, but were unable to say if the latest attempted theft is connected. It occurred in a similar manner as the others, most of which also occurred during the morning rush hour.

Wednesday’s attempted carjacking occurred about 7:50 a.m. at 7th and K streets Northeast near Gallaudet University. Officer Araz Alali, a police spokesman, said two men in a black Acura with Maryland temporary license plates rear-ended a Chrysler 300.

Further details were not immediately available, but police said the men were not successful in getting the Chrysler and drove off in the Acura. Police were quickly called and observers in the D.C. police helicopter, Falcon, spotted the car at Central and Southern Avenues in Southeast Washington. Police said officers lost sight of the car as it headed toward Prince George’s County.

There have been at least four other similar robberies or attempts in the District since Aug. 28. District police issued an alert earlier this month warning people to call police before getting out of a car after being struck from behind. No weapons were used in any of the robberies.

Victims have included a teacher of at-risk students, a postal carrier and an attorney with the U.S. Department of Transportation.