A bomb disposal expert checks a luggage near the site of a blast at a terminal in Shanghai's Pudong International Airport, China, June 12, 2016.[Photo/Agencies]

Five people were injured by an explosion at Shanghai Pudong International Airport on Sunday afternoon, said the official Weibo account of Shanghai Airport Authority.

At about 2.26 pm, a man threw beer bottles filled with explosives at the check-in counter at terminal two of Shanghai Pudong International Airport, injuring four people, including a Filipino, according to Shanghai Police.

The man then slit his own throat after the explosion, and he was severely injured. The four injured passengers were sent to hospital immediately, added the police notice.

A male witness said a passenger in his tour group noticed a glass bottle near his foot but before he could react, the bottle exploded, and after half a minute, another beer bottle rolled near them, injuring two senior passengers who failed to escape the second blast and were wounded by the glass shrapnel.

The Pudong New Area People's Hospital has set up a team of more than 10 doctors to save the passenger whose jugular vein was seriously injured, while the other three wounded patients received medical treatment in the hospital in the afternoon, according to Caixin report.

The wounded were quickly rushed to hospital, and the site of the blast policies under police control, with only three check-in desks at the area being affected by the incident, according to Shanghai Airport Authority (SAA) and Shanghai Police.

Security check was upgraded immediately after the incident as bomb-proof security was added at the front door of the airport, the Dragon TV reported.

"The travelers will undergo a thorough security clearance along with their carry-on baggage," said Su Weiwei, an SAA official.