Delta Air Lines pilot Rustom Bhagwagar, 34, was arrested on Saturday night (local time) after his plane landed at San Francisco International Airport. Following a three-month federal investigation, he faces five counts of oral copulation with a child under 10, according to the Contra Costa County Sheriff`s Office.

Federal agents and sheriff`s deputies stormed the cockpit of the Delta Airlines flight over the weekend and arrested the co-pilot, authorities said, CBS News reported. Flight 2809 arrived at San Francisco International Airport at about 9:35 pm (local time) Saturday when agents from Homeland Security Investigations and Contra Costa Sheriff`s deputies boarded the Boeing 757-300 jet and removed the co-pilot, the Contra Costa County Sheriff`s Office said, as per CBS News.

The investigation began in April after the Sheriff`s Office received a report of sex crimes against a child, the office said. Detectives later learned that Bhagwagar was an airline pilot and was due to fly into SFO on Saturday evening. A spokesperson for the Department of Homeland Security told CBS News Bay Area that HSI agents assisted the sheriff`s deputies by gaining them airport and plane access.