So far, only suspected shooter Brenton Tarrant has been charged with murder for the attack on two mosques in Christchurch on Friday, according to New Zealand Police Commissioner Mike Bush.

Bush said at a press conference Sunday that others had been arrested but that police did not believe they were involved in the attack.

“I will not be saying anything conclusive until we are absolutely convinced as to how many people were involved, but we hope to be able to give that advice over the next few days,” Bush added.

Two other people were apprehended, Bush said, and police seized a firearm from them. The woman was released without charge, while the other man was charged with firearms offenses.

One additional man was also arrested in the aftermath of the shooting, but police said they don't believe he was involved in the attack either. Bush said the man was helping get children to safety but that he armed himself, "which is not the right approach."