(Portland, OR)  --  Police say they've arrested two suspects accused of attacking a man with a mallet in southeast Portland.  Police say the victim was near Southeast 122nd and Powell Monday night when the two suspects approached and started hitting him with a mallet and a steel bar.  Two security guards saw the attack and stopped it.  Police arrested 18-year-old Jakub Cyr and a juvenile on assault charges.  The victim was hospitalized with significant injuries, but he's expected to survive.