Saboteurs blew up a gas pipeline in the flashpoint Syrian region of Homs on Tuesday, the official SANA news agency reported, as Arab League observers visited the provincial capital. \"An armed terrorist group targeted in a sabotage operation at 3:00 am (0100 GMT) on Tuesday a pipeline carrying gas between Abd Kafar and Rastan,\" said SANA, referring to towns in Homs, a hotbed of dissent against the regime.