Seven people in Indonesia have been detained after a failed plot to attack Pope Francis during his visit to the country.

Local media says the people – listed as HFP, LB, DF, FA, HS, ER and RS – were taken by police on Sept. 2 and Sept. 3 in Jakarta, Bogor and Bekasi.

Spokesperson Colonel Aswin Siregar told reporters that investigations are still ongoing, and it is not known if they detainees knew each other or were part of the same terrorist group.

“We have a mechanism to monitor and filter. We had tip-off information from members of the public,” he said.