(CNN)Twin suicide bombs rocked a busy market in central Baghdad on Thursday morning, killing at least 28 people and injuring 73 others, a security official told CNN.Security forces say they pursued the two attackers before they blew themselves up. It was the first suicide attack to strike Baghdad in nearly two years.The first bomber entered the marketplace and, pretending to be sick, asked for help, causing people to gather around him before he blew himself up, according to officials and state media. The second bomber then drove to the scene on a motorbike before detonating his explosive vest.No group has claimed responsibility for the attack, though it bears the hallmarks of Sunni jihadi groups who have carried out numerous similar attacks in Iraq. Double bombings were common in the country during the height of its sectarian war between 2005 and 2007.“The twin terrorist bombings against the safe citizens of Baghdad at this time confirm the attempts and endeavors by dark groups to target the national needs and aspirations of the Iraqi people for a peaceful future,” Iraqi President Barham Salih said in a tweet. “We stand firmly against these rogue attempts to destabilize our country,” he added.