At least 21 people were injured following a four-car collision in Yuen Long on Friday. Police received reports at about 6.30pm, saying two buses, one light truck and a private vehicle crashed on Yuen Long Highway. Nine men and 12 women suffered light injuries. None of them were trapped. The Transport Department said it closed some Tuen Mun-bound lanes on the highway for the recovery operation. It also called on motorists to use other routes because traffic is heavy in the area, as the slip road...