Tactical Unit: Comrades in Arms (simplified Chinese: 机动部队 - 同袍; traditional Chinese: 機動部隊 - 同袍) is a 2009 Hong Kong neo-noir action thriller film directed by Law Wing-Cheong.

[6] As a front-line police officer, you never leave a brother behind or bite a brother's behind... Tactical Unit Column Sergeant Sam (Simon Yam) and May (Maggie Siu) have been working together for some time but have never got along well.

A daring bank heist takes the tactical unit to Hong Kong's remote mountains searching for armed bandits.

As Sam and May lead their team to conduct sweeps amidst treacherous terrain and deadly ambushes, they understand the only way to survive the mission is if they stick together as one.

Several scenes of the film were shot at St. Joseph's Church in Ma On Shan Village.