Captain Pham Huu Phat, Nguyen Thanh Long Giang, Dinh Kien Trung, Nguyen Duc Thien, Ha Niem Tien and Phan Luu The Son were detained for questioning immediately after Dong Nai's 5-3 loss to Than Quang Ninh.
Long Giang, Kien Trung and Duc Thien are all former Vietnam internationals at Under-23 level, while The Son is an Under 19 representative.
"After collecting all information and evidence, we worked with the Vietnam Football Federation (VFF) leaders and decided on a strict punishment, although the tournament may not wrap up with a happy ending this season," Tien said in Hanoi on Monday.
"These players allegedly defied the law, although they saw what happened to Ninh Binh's players.
"They must be prosecuted for bribery and extortion. It is to save Vietnamese football. The police will soon have a final conclusion on this case."
The arrests followed Dong Nai's 5-3 loss to Quang Ninh on Sunday.
