Spain's Interior Ministry on Tuesday said that the police have arrested a Pakistani man suspected of "promoting terrorism and militant propaganda" on social media networks.

A ministry statement said that the 25-year-old resident of the northern Catalan city of Lleida was part of a cell partially dismantled with the arrest of three Pakistani brothers in Lleida last year.

The ministry said that the man detained on Tuesday had become "more engrossed in radical activities" in recent weeks.

Sixteen people were killed in attacks in the Catalan capital, Barcelona, and another Catalan coastal town last month. The militant Islamic State group had claimed the attacks.

Spain says its police have been involved in the arrests of 200 suspected activists since the country raised its security alert to one step below the maximum in June 2015.