"[The investigation] is at a good point," said Mogadishu police chief General Ahmed Hassan Maalin. The four police officers "are being investigated because the vehicle that exploded passed through the checkpoint they were responsible for". Investigations have also resulted in the arrest of several other individuals believed to have links to al-Shabaab, he said.
The blast occurred when an explosives-laden car parked in front of the parliament building detonated as lawmakers exited to attend afternoon prayers. The explosion killed one police officer and two civilians. No group has claimed responsibility for the blast.
Maalin said Mogadishu residents can expect security operations in the city to continue until perpetrators are arrested and peace is restored in the city.
Police have been operating checkpoints day and night to ensure the safety of citizens, the news agency reported.