An Ottawa man described as displaying paranoid behaviour before disappearing in a jungle in the Dominican Republic for five nights was found alive Saturday after a long and unusual search.

Patrick Brown was found on April 25, 2015 after five nights in the jungle in the Dominican Republic. (provided by family) Patrick Brown, 37, was in a panic when he ran off into the countryside surrounding Guananico on Monday, his family told CBC News.

Brown, an avid camper, evaded the search efforts of volunteers for days but was eventually found on Saturday, his brother Gord Brown told CBC News in Ottawa on Saturday.

"He's not the type of person to get into trouble," Brown said. "I really don't understand."

Patrick Brown was vacationing with his parents in Puerto Plata when he left the resort with a local tour guide. The guide told the family they were touring a ranch when Brown started acting extremely paranoid.

"He said, 'They're after me. They're going to kill me,' and ran off into the jungle," Gord Brown said, adding that his brother does not have a history of mental health issues or drug abuse.

"This is just totally unnatural for him," Brown said.

Brown said Sunday that his brother was in the hospital in the Dominican Republic but that he hoped he would return home soon.