Karachi, Oct 14 (ANI): Pakistani paramilitary officials claimed to have foiled a bid to break into Karachi's Central Jail. Addressing a news conference in Karachi, a senior Rangers official, Colonel Tahir Mehmood said Rangers personnel had discovered a 40-metre-long underground tunnel dug under a house near the central jail. Mehmood said they had arrested suspects from a banned militant organisation but did not name it or say how many were detained. However, he said the arrested men had revealed that a tunnel was being dug to enter directly into the jail barracks where high-value targets are being held. He said around 10 metres of further tunnelling was required to enter the jail premises. The Karachi jail holds a large number of high-profile militant detainees and has repeatedly come under threat in recent years. Mehmood said nearly 100 dangerous terrorists were present in the cell near the well where the suspects wanted to enter through the tunnel.