Church Member Hasn't Been Charged After Deadly Shooting of Another Member at Sunday Service Investigators looking at whether the shooting was "justified."

 -- A church member is dead and another member is cooperating with authorities after an altercation between the two turned into a deadly shooting at the Keystone Fellowship Church in Montgomery County, Pennsylvania, this morning, officials said.

The victim, 27-year-old Robert Braxton, was shot in the chest during "a disturbance that escalated into an altercation between two church members," at today's 11 a.m. service, Montgomery County District Attorney Kevin Steele said. Braxton died at a local hospital, Steele said.

Steele said the suspected shooter has not been charged at this point and is cooperating as the investigators work "to determine whether this shooting was fired under the law."

He added, "We are still interviewing witnesses and the autopsy is scheduled for tomorrow at the Montgomery County Corner's Office."

The shooter had a permit to carry a concealed weapon, which was believed to be a semi-automatic handgun, Steele said.

The relationship between the church members was not clear, Steele said.

Hundreds of people were at the Keystone Fellowship Church service, Steele said.

The church said in a statement: "One man was shot and another is being questioned by police; no one was else was hurt."

The church added, "Our congregation is in prayer for everyone involved."

The Keystone Fellowship Church is located about 25 miles north of Philadelphia.

ABC News' Rex Sakamoto contributed to this report.