KHYBER AGENCY: Security forces on Sunday kept the Pak-Afghan border closed for five hours due to security concerns. A Frontier Constabulary (FC) official reported that they receiveda tip that some suspected persons had crossed into Pakistan via the Torkham border, hidden in containers. At 5:30am, the border security forces closed the border for all kinds of movement. The FC launched a massive search operation in bordering areas including Bacha Mena, Kabalo Mena and other localities of tehsil Landi Kotal. According to sources, eight suspects were arrested and a huge quantity of arms and ammunition were seized in a search operation in Torkham. At 11am, the areas were cleared and the border was opened for traffic and pedestrian crossing.