A criminal proceeding against 1Malaysia Development Berhad (1MDB) has been opened by Switzerland’s Office of the Attorney General (OAG).

"The Office of the Attorney General confirms that, on Aug. 14 2015, it opened a criminal procedure against two entities of 1MDB as well as against an unknown person," said its spokesman as quoted by Reuters.

He added that the proceedings involved suspected corruption of public foreign officials, dishonest management of public interests and money laundering.

The proceeding opened following two communications from the Money Laundering Reporting Office Switzerland (MROS).

On Wednesday, Swiss financial regulator FINMA said they were checking with several banks in the country if any business was carried out with 1MDB.