A security guard working for US mining giant Freeport has been killed, and seven other people injured, in a pair of attacks by suspected rebels in Indonesia's Papua province. The assaults were in the same area where authorities are investigating the fatal shooting a day earlier of a 29-year-old Australian working for the company. The escalation in violence in one of the nation's most underdeveloped and remote regions is an unwelcome development for the Indonesian President, who was re-elected just last week for a second five-year-term. It also raises questions about a possible resurgence of Papua's secessionist movement, which until recent months had shown few signs of life.