terroristic threats and more than a dozen arrests. rosemary. >> all right, to australia now where prime minister tony abbott says security officials have intercepted an increased level of terrorist chatter since last week's siege at a sydney cafe. at 7 network's mark riley reports abbott is warning the public to remain alert through the holidays. >> reporter: the smiles of this swearing in was soon replaced by worried looks for tony abbott and his senior minister. >> as we prepare to join family and friends we do need to be conscious of the fact that the terror threat remains high. >> reporter: immediately after the investiture, the cabinet was told chatter had increased dangerously after the sydney cafe siege. it was time to issue a warning, they advised. >> an attack is likely.