A camouflage-clad man carrying a replica assault rifle sparked a major security scare and the lockdown of two schools and a childcare centre when he went on a "training" mission in Brisbane's southside.  The drama began when a Rochedale resident called police, fearing a lone gunman could be at large.  Officers in bullet-proof vests launched a manhunt before finding and arresting the man within an hour just after midday.  Police said the shocked 26-year-old was seemingly oblivious to the widespread drama he had caused.  The man appeared to be wearing a military uniform. (9NEWS)  "He was clearly in the middle of doing some very serious training," Inspector Daniel Bragg told reporters.  "He's a very fit looking young man, I can't comment about what was going through his mind but he was certainly very compliant with police.  "They get the impression he wasn't aware of the havoc he wreaked as a consequence of his actions."  Video footage showed the young man in full camouflage clothing wearing a backpack and carrying a fake black semi-automatic rifle.  Rochedale High School, Redeemer Lutheran College and Rochedale Early Learning Centre were all sent into lockdown while police hunted the man.  Staff at the nursery ushered 75 babies and toddlers into locked rooms with the blinds pulled and urged the children to stay silent while the man was found.  Police forced the man to the ground before taking him away. (9NEWS)  "We stayed in lockdown for about 45 minutes until the police had checked the building and told us it was safe," director Debbie Hines told AAP.  "Parents had got the word on Facebook and I was getting lots of phone calls.  "They were obviously worried and upset but we were able to inform them that their children were safe."  Police following the initial call out. (9NEWS)  The 26-year-old was later issued with a notice to appear in Holland Park Magistrates' Court on December 9 on one count of public nuisance.  It is understood he is a member of the Australian Army based at Townsville.  Townsville’s Lavarack Barracks is home to several army units, including 1st, 2nd and 3rd battalions of the Royal Australian Regiment.
Two Brisbane schools are in lockdown and police are searching the area after reports an armed man was spotted.