Killing of foreign nationals

An Italian national was shot dead in Dhaka's diplomatic area Gulshan and a Japanese national was also killed in Rangpur. These two murders were committed in a span of five days. Who could be behind these horrible crimes? What is the motive for killing these foreign nationals?

It is the duty of the law enforcing agents to unearth the mystery and arrest the criminals. The murderers must be caught at any cost. But we are noticing that the higher-ups have started blaming so and so, even though the investigation is yet to make any headway. It is not the right approach as it will influence the investigation.

Nur Jahan
Chittagong