Hong Kong Police said that they defused two homemade nail bombs discovered in the grounds of a school and are investigating whether the devices were linked to political unrest in the city. Police said, bomb disposal officers rushed to Wah Yan College in Wanchai district after a janitor noticed the devices.<br />''<span style="color: #222222;"><br />''Senior Bomb Disposal Officer Alick McWhirter told reporters last night that the bombs were complete, fully functional and ready to be used. He said, the two devices contained a total of 10 kilograms of high explosives and that the remote control bombs were designed to be set off using a mobile phone. Nails had been added to the bombs, which used a homemade ammonium nitrate based explosive, to increase their destructiveness. The discovery comes with Hong Kong engulfed by six months of sometimes violent protests – although the last three weeks have seen a significant drop-off in clashes and a massive largely peaceful march on Sunday.</span><br />