A 31-year-old man was arrested at an airport in northwest England on Thursday in connection with last month’s Manchester synagogue attack, in which two people died.
The man was detained on suspicion of commission, preparation and instigation of acts of terrorism, Greater Manchester Police said.
He was arrested at Manchester Airport after arriving on an inbound flight and remains in custody for questioning, the force added.
A total of seven people have now been arrested in connection with the attack at the Heaton Park Hebrew Congregation Synagogue on October 2.
A 30-year-old man arrested on October 9 on suspicion of failing to disclose information under the Terrorism Act remains on bail, according to police.
Five of those arrested have been released without charge.
Syrian-born UK citizen Jihad al-Shamie started his attack by driving his Kia Picanto at security staff and the external gates of the synagogue.
Worshippers had gathered there for Yom Kippur, the holiest day in the Jewish calendar.
Wearing a fake suicide belt, he then stabbed father-of-three Melvin Cravitz, 66, multiple times and tried to storm the synagogue before being shot dead by police.
Cravitz died from multiple knife wounds inflicted by Shamie, an inquest heard.
Adrian Daulby, 53, died from a single gunshot wound to the chest that had been fired by a police officer responding to the situation.
