ISLAMABAD - Military sources Tuesday strongly refuted media reports that US Central Command (Centcom) Chief, General James Mattis, had held a meeting with Army Chief General Ashfaq Parvez Kayani and discussed joint operations against high value targets. The sources said that General Kiyani was in Quetta when General Mattis visited Islamabad. As regards the joint operations as had been often indicated by the US media, the sources said it would be nothing else but in the sphere of intelligence sharing between the two countries.