Baltimore police arrest 2 more in video beating case April 25, 2012 -- Updated 1453 GMT (2253 HKT) Police in Baltimore have made the third and fourth arrests in a violent robbery case The arrests were made Tuesday evening; the names are not yet released There are no additional suspects in the case, police say The beating on March 18 made national news after much of it was caught on video (CNN) -- Police in Baltimore have made the third and fourth arrests in connection with a violent robbery that left a man battered and stripped of his clothes last month while onlookers laughed and did nothing to help. The arrests were made Tuesday evening, according to police spokesman Anthony Guglielmi. The names of the suspects were not yet released, he said. There are no additional suspects in the case, he added. The beating early March 18, after the night of Saint Patrick's Day, made national news after much of it was caught on video and posted on the Internet. On Monday, police said they arrested Shayona Davis, 20, for alleged involvement in the attack. CNN's Nick Valencia contributed this report