Palestinian president Mahmud Abbas warned Saturday of action if Israel failed to release the fourth and final batch of veteran prisoners as agreed under a US-backed deal. "We are saying, if they are **t released, this is a violation of the agreement and allows us to act however we see fit within the **rms of international agreements." Israel agreed to release a total of 104 long-term prisoners when talks kick-started by US Secretary of State John Kerry began in July. Earlier this month, Abbas said Palestinians will **t agree to extend peace talks with Israel unless it releases more prisoners beyond the final batch.