Solemn ceremonies marking the anniversary of the Sept. 11 terrorist attacks were held around the Island Wednesday morning.

This marks the 18th anniversary of 9/11.

Observances were held at fire and police stations five minutes before 10 a.m., when a national moment of silence was held, marking time the lower tower collapsed in New York city.

In Oak Bluffs, police, fire and EMS assembled at the station. The flag was lowered to half mast, and the fire bell was rung to simulate the call for fire. After a moment of silence to honor fire, EMS and police who lost their lives, the bell was rung one more time to simulate the firefighter’s last call of duty.

Edgartown posted an account of its service on the police department’s Facebook page.

Flags flew at half mast in every Island town.

Noah Asimow contributed reporting.