A man suspected to be the killer of the Abuakwa North MP, Joseph Boakye Danquah-Adu, has been arrested.
He was picked up by the police on Thursday. He is currently at the regional police headquarters being questioned.
Two other persons were picked up in connection with killing.
JB Danquah, was gruesomely murdered at dawn on Tuesday February 9 at his home at Shiashie in Accra.
Police investigations showed he suffered two stab wounds, one to his rib, the other to his abdomen.
The wife of the MP was said to be in another room when the incident occurred.
Five people including a security man, a driver and some others at the residence were picked up by the police to help with investigations.
The NPP had indicated that it suspected foul play in the murder.