ISLAMABAD An ISPR spokesperson has strongly refuted reports in the media quoting unnamed US sources that elements in Pakistan security forces tipped off terrorists helping them to escape the purported IED factories in Waziristan. This assertion is totally false and malicious and the facts on the ground are contrary to it. Explaining further, the spokesperson said that intelligence information was received regarding four compounds suspected of being used as IED-making facilities. Operations were launched on all. Two were found to be used as IED-making facilities and have been destroyed. Information on other two proved to be incorrect. Some persons have been arrested and they are under investigation. They military authorities said they are determined to end terrorism.