Public prosecutors have indicted six suspects over the death by drowning of actress Nida "Tangmo" Patcharaveerapong on Feb 24.

The six are speedboat owner Tanupat “Por’’ Lerttaweewit, Phaiboon “Robert’ Trikanjananun, Wisapat “Sand’’ Manomairat, Nitas “Job’’ Kiratisoonthisathorn, Tangmo’s manager Idsarin “Gatick’’ Juthasuksawat and Peam “Em’’ Thamtheerasri.

Mr Peam was not in the speedboat when the actress fell into the Chao Phraya river and drowned, but he allegedly advised the other passengers to delay giving statements to police.

The prosecutors indicted Mr Tanupat on five charges - recklessness causing death, giving a false statement, driving a boat without a licence, dropping objects into the river, and illegally taking an anti-anxiety drug.

Mr Phaiboon was indicted on four charges - recklessness causing death, driving a boat with an expired registration, driving a boat without a licence, and dropping objects into the river.

Wisapat was charged with recklessness causing death.

Mr Nitas was indicted on three charges - recklessness causing death, assisting others to avoid punishment or receive less punishment, concealing evidence, and dropping objects into the river.

Ms Idsarin was charged with recklessness causing death, giving a false statement and assisting others to avoid punishment or to receive less punishment, and concealing evidence.

Mr Peam was charged with directing others to make false statements and assisting others to avoid punishment or receive less punishment, and concealing evidence.

Tangmo, 37, fell into the Chao Phraya River near Pibul 1 pier in Muang district of Nonthaburi on the night of Feb 24. Her body was found two days later.