Another accused of Junu Sarma murder case had been detained by Police on Sunday.
Police source said that accused Mantu Ali was also involved with another three accused of the murder case.
Earlier, three persons involved in Junu Sarma murder case were apprehended by the Kamrup police.
According to police, the accused were identified as Putul Ali alias Saddam Hussain, Pranab Kalita and Sunil Kumar Mishra.
Reportedly, Pranab Kalita was the driver of Junu Sarma while Sunil Kumar Mishra is a bank official.
Police took three accused in custody for investigation.
Their interrogation is on and more information is waited – police said.
Junu Sarma was shot dead in Agyathuri near Guwahati on October 9. The woman was an employee of SBI Dadara, who was returning from work in a car.