Michigan Church Shooting: 1 Injured, Gunman Dead

At this point, the Wayne Police Department is still investigating this incident, with the assistance of multiple local, state and federal partners.

A bomb-sniffing dog was brought to the scene by the Michigan State Police and a police bomb squad was also brought to the scene, according to officials, but there was no immediate confirmation from police that explosives were involved in the incident.

The church shooting came during a heightened threat environment across the country following the U.S. attack overnight in Iran that destroyed or severely degraded three of Iran's nuclear facilities, according to White House officials.

The attack in Wayne came in the wake of a public bulletin the Department of Homeland Security issued after the U.S. strikes in Iran, warning that "low-level cyber attacks" against U.S. targets "are likely" and that extremists inside the U.S. would be more likely to turn to violence if Iranian leadership calls for such retaliation.

The bulletin further urges the public to report any suspicious activity.

It was not immediately known if the church attack has any connection to the U.S. attack on Iran's nuclear facilities.

The suspect's name was not immediately released. The security guard was also not immediately identified by authorities.