ST. LOUIS (AP) — Missouri Gov. Jay Nixon is heading to St. Louis as anticipation mounts about a possible grand jury decision on whether to indict a white police officer in the fatal shooting of a black 18-year-old.

Nixon spokesman Scott Holste confirmed Monday that the governor is traveling to St. Louis from the Capitol. He did not say why, but the governor’s travel comes as the city braces for an announcement from the panel.

Officer Darren Wilson shot Michael Brown on Aug. 9. The shooting triggered riots and looting, and police responded to protesters with armored vehicles and tear gas.

Authorities have stepped up security in the St. Louis area in anticipation of renewed protests when the grand jury’s decision is made public.

Gov. Jay Nixon is reaching out to St. Louis-area clergy in advance of a grand jury announcement on whether a white police officer will be charged for fatally shooting a black 18-year-old.

The announcement expected Monday evening comes more than three months after Ferguson officer Darren Wilson shot Michael Brown, triggering weeks of protests.

The Rev. Ronald Bobo Sr. says he and other clergy have been invited to participate in a conference call with the governor.