Gurdwara Lal Khoohi (The Bloody Well), alternatively Gurdwara Lal Khooh or Lal Khoo, literally Gurdwara Well of Blood was a historical Gurdwara located near Mochi Gate in Lahore, Pakistan.
It was built at the site where the fifth Sikh Guru, Guru Arjan Dev, was incarcerated during the reign of the Mughal Emperor, Jehangir.
It has since been converted into a Muslim shrine, Haq Char Yaar, in reference to the first four caliphs in Islam. In 2007, the Shiromani Gurdwara Parbandhak Committee condemned this act by Pakistani Muslims.