British police arrested two 20-year-old men in Manchester on Wednesday in connection with last month's suicide bombing that killed 22 children and adults attending a concert by U.S. singer Ariana Grande, police said on Wednesday.
One was arrested overnight when police searched an address in the city, while the other presented himself voluntarily at a police station.
In total, 21 people have been arrested so far in the investigation pertaining to the suicide bombing. Twelve were released without charge and nine remain in custody.
The released ones included a teenage boy and a woman arrested in the week ended May 29.
On the other hand, bomber Salman Abedi's father and brother are also in detentionin Libya.
Abedi had reportedly returned from Libya only a few days before the attack that left 22 people dead, including seven children under 18.
However, police are still trying to establish the extent of his wider network.