Gunmen attempted to murder Haitian Prime Minister Ariel Henry on Saturday during a ceremony marking the Caribbean country’s independence, according to his office.

On Monday, Henry’s office announced that “bandits and terrorists” attempted to assassinate the prime minister in a church in the northern city of Gonaives, where a ceremony commemorating the country’s 218th anniversary was being held.

As an armed gang began firing outside the church in Gonaives, video footage on social media showed Henry and his entourage racing for their vehicles.

Haitian media pointed to possible gang involvement in the shooting, which they said killed one person and injured two more.

Gangs’ hold on parts of Haiti has strengthened since the assassination of President Jovenel Moise in July.

Police, who called Saturday’s attack the work of “armed groups,” were unable to immediately confirm casualties. Prior to the incident, a local gang boss had made threats against Henry in local media.

The prime minister’s office said arrest warrants had been issued for the suspects who fired on Henry’s convoy.

The attack has renewed concerns about the safety of officials in Haiti since Moise’s assassination.

Henry, whose administration is facing mounting challenges to its legitimacy, was sworn in as prime minister barely two weeks after Moise’s killing at the hands of suspected mercenaries. The country has yet to set a date to elect Moise’s successor.