In a livestream of the church service, the gunman can be seen getting up from a pew and talking to someone at the back of the church before pulling out a gun and opening fire.
Move comes in response to mounting criticism that the high degree of confidentiality has been used to protect pedophiles, silence victims and prevent police from investigating crimes.
The "heroic acts" the pastor saved the church from further violence, police said.
As a part "Choose to Vaccinate" campaign Abu Dhabi's Department of Community Development (DCD) has organised a series of visits to non-Muslim places of worship in the emirate to vaccinate people against COVID-19.
Prime Minister Micheal Martin will make a formal apology to those affected by the scandal and will provide financial recognition and laws to support excavation, exhumation and, where possible, identification of remains, the government said in a statement.
Congolese military spokesman Antony Mualushayi said the "terrorist act" happened in a Pentecostal church in North Kivu province's Kasindi, a town on the border with Uganda.
A pilot crash landed a medical helicopter without loss of life in a residential area of suburban Philadelphia, somehow avoiding a web of power lines and buildings as the aircraft fluttered, hit the street and slid into bushes outside a church.
Police spokesman Moses Carter told the media the death toll was provisional and "may increase" because a number of people were in critical condition. He added that children were included among the dead.
Police have not given a death toll, but multiple local media outlets reported that the shooting had left seven dead and eight seriously injured.