A Good Friday service at a Catholic church in south London was shut down for breaching national lockdown restrictions, police said.
Met Police said officers found some worshippers without masks and not socially distancing at Christ the King church on Balham High Road on Friday.
Video of officers addressing the congregation, from the altar of the church, has been circulating online.The church said all "government requirements have been complied with".
A representative of Polish Catholic Mission Balham, which runs the church, added worshippers "obeyed" the police "without objection".
"We believe, however, that the police have brutally exceeded their powers by issuing their warrant for no good reason," the spokesman added.
"We regret that the rights of the faithful have been wronged on such an important day for every believer, and that our worship has been profaned."