SHANGHAI ?-- A man who was allegedly behind a Shanghai airport explosion three months ago has been arrested, local procurators said on Monday.

The warrant of the arrest of Zhou Xingbai was issued by the people's procuratorate of Shanghai's Pudong District.

Zhou, 29, allegedly threw a homemade explosive device in a beer bottle at a check-in counter in Terminal 2 at Shanghai Pudong International Airport at around 2 p.m. on June 12, injuring three passengers.

Zhou cut his own throat with a knife at the airport, but was taken to the hospital for medical treatment, according to police.

Hailing from Tongren City in Southwest China's Guizhou province, he became a migrant worker in 2006 after finishing middle school.

According to police, he has been addicted to online gambling since 2014, leading him to squander his savings and take on heavy debt.

Zhou wrote on his WeChat account that he owed many people money, and was going to do something "very crazy" that would cost his life.

Police said they found explosives used to make firecrackers in Zhou's house.