GAROWE, Somalia — Gunmen shot and killed a manager at a Dubai government-owned port operation in Somalia’s semiautonomous region of Puntland on Monday, a local government official said, and the Islamist militant group known as the Shabab claimed responsibility for the attack.

The Shabab were also suspected to be behind a car bombing at a shopping mall in Mogadishu, the capital of Somalia, later in the day. The blast killed 11 people and wounded 10 others, the police said.

The attack at the port in Bosaso came when two men disguised as fishermen shot the executive, Paul Anthony Formosa, at a fish market as he was traveling to work, said Yusuf Mohamed, the governor of the Bari region of Puntland, where the killing took place.