PARIS — The terrorists who killed 130 people in Paris in November were in contact by cellphone with at least one person in Belgium during their attacks, suggesting that they may have been coordinated or monitored from abroad while killing, according to French police reports on the investigation.

The reports on the cellphone connections come after weeks of mounting evidence of ties between Belgium and the assailants in France. They also raise questions about the breadth of the terrorist network surrounding the attackers and challenge an assumption that one of them, Abdelhamid Abaaoud, was the chief planner.

Image Abdelhamid Abaaoud, who has been described as the organizer of the Paris attacks. The new report raised the question of whether he was in charge.



Credit... via Agence France-Presse — Getty Images

Instead, the reports suggest, Mr. Abaaoud may been reporting back to someone more senior.

An account of the police reports, which first appeared in the French newspaper Le Monde on Wednesday and were confirmed by the Paris prosecutor’s office, said that cellphones used by two of the three teams of assailants had communicated with two numbers at the same location in Belgium during the attacks.