At least two people have been hurt in the three explosions across the city. The blasts were heard around 8.30am local time. Thai police said they were investigating the cause of the explosions.
Some of the blasts were heard at a government office and others near at least two other sites near central Bangkok.
There were reportedly two explosions at the BTS Chong Nonsi station and one in Phra Ram 9 road and one at the government’s Changwattana building.
A concrete bench was destroyed in the blast.
A senior police officer said two street cleaners were injured by what appeared to have been a homemade bomb in the Suan Luang district.
READ MORE: Annabelle Comes Home real life horror: British man dies watching film
Colonel Kritsana Pattanacharoen, deputy spokesman from the Royal Thai Police, said: “We found a tube used for snacks but inside there was nothing that could cause an explosion.
“The suspect might only wanted to have caused panic.
“There was a small amount of ball bearings in both boxes. There were two boxes in different places and both were in front of the police department.”
On Thursday, Thai police said they had found two fake bombs on Thursday near the venue of the regional security meeting.
The packages prompted a brief security scare but were quickly deemed harmless. It was unclear whether the meeting was the target.
Police said two men had been arrested in connection with the fake bombs.
Bangkok is currently hosting a regional security meeting of foreign ministers from the Association of Southeast Asian Nations (ASEAN) and their counterparts from world powers including the United States, China and Russia.
China’s top diplomat Wang Yi and US Secretary of State Mike Pompeo are attending the forum along with other regional and global officials.