The concentration of salt near Khewra, Punjab, has been discovered around 326 BC when the troops led by Alexander the Great stopped to rest there and noticed their horses licking the salty rocks. Salt was probably mined there from that time, but the first mining records are from the Janjua people in the 1200s. Himalayan salt is mostly mined at the khewra Salt Mine in Khewra, Jhelum District Punjab, situated in the foothills of the Salt Range hill system in the Punjab province of the Pakistan Indo-Gangetic Plain. It is located about 310 km (190 mi) from the Himalayas, 260 km (160 mi) from Lahore, and 298 km (185 mi) from Amritsar India.