Police have been called to the Pennsylvania compound of Fethullah Gülen, the US-based Muslim cleric accused by Turkey of instigating a failed 2016 coup, after a guard fired a shot at a suspected armed intruder.

The security guard fired a warning shot as the person tried to enter the compound’s gates, and the intruder fled, said Gülen spokesman Alp Aslandogan. There were no arrests or injuries, he said.

“Just one shot was fired,” Aslandogan said. “The person disappeared. The incident is over as far as we’re concerned.”

Gülen was inside his residence on the compound at the time.

“His response was that the authorities should be informed and everybody should cooperate fully with the investigation to find out what happened,” Aslandogan said.

Several Pennsylvania state police cars were seen around the sprawling gated compound and retreat in Saylorsburg in the Pocono Mountains, according to photographs shared online by local news reporters.

Police, who left the scene a short time later, did not respond to requests for comment. A local television station, WNEP, reported that police were still searching for the suspected intruder.

President Recep Tayyip Erdoğan and the Turkish government accuse Gülen of orchestrating an attempted coup in July 2016, in which rogue soldiers commandeered tanks and fighter jets, bombing parliament. More than 240 people were killed in the violence.

Gülen denies the accusations.

His compound is patrolled by a team of uniformed private security guards, some of them armed with handguns.

Erdoğan has repeatedly demanded that the United States extradite Gülen to Turkey, straining relations between the two Nato allies. Washington has asked for more compelling evidence of Gülen’s involvement in the attempted coup.

A US evangelical pastor, Andrew Brunson, has been held under house arrest in Turkey after authorities charged him with links to Kurdish militants and Gülen supporters, an accusation he has denied. That case has become a key issue in the worsening diplomatic conflict between the two countries, leading to US sanctions.