KIEV (Reuters) – Ukrainian police have detained people in connection with the killing in 2016 of the investigative journalist Pavel Sheremet, Interior Minister Arsen Avakov said on Thursday.

“This is the result of very complex and persistent work of real professionals and an important step toward fully solving the case!” he wrote on Facebook.

Sheremet was killed in a car bomb in central Kiev on his way to work.

Reporting by Pavel Polityuk and Matthias Williams; Editing by Andrew Heavens