The four injured persons are currently recuperating at the Wellawaya Hospital.
The recipient of the parcel was apprehended when he came forward to clear the parcel.
The Police Special Task Force has arrested the woman following a tip received by Mannar police
The suspects were produced in the High Court of Vavuniya on Tuesday.
Five people have been shot dead just in the last four days
The Ministry of Education said the incident had taken place last Wednesday (25).
The suspect had also joined the search party.
Twenty-two statements have been recorded thus far, but no suspects have been arrested yet, police said.
Police said the motive and the perpetrators have yet to be identified.
"They will be produced to the court on Friday (27)" Thalduwa said.
The CID has also arrested 25 with regard to attack against protesters at Galle Face - police spokesman
The group had attacked the 41-year-old victim with a club and also stabbed him with a sharp object.
The victim sustained multiple injuries and was rushed to the Wathupitiwala Hospital where he succumbed to his injuries.
Initial investigations have also revealed that the child was suffering from low blood sugar since birth.
The parcels had been sent from the Netherlands, Canada and the United States.
The driver who was smuggling drugs and the ambulance assistant who acted as an accomplice were also arrested.
“The postmortem was done yesterday, and the cause of the death has yet to be determined.”
Bodies were found in Bambalapitiya, Wellawatte and Kolonnawa, all densely populated areas.
The woman, allegedly from the Kottawa area, had been evading arrest since 2017, police said.
The suspects are residents of Colombo 15 and Dehiaththakandiya.
The victim was attacked Monday (03) on Madampitiya Lane in Grandpass, Colombo,
The girl was allegedly beaten to death by her father and uncle over a purported romantic relationship.
The grenade has now been disarmed, police said.
Both the prisons department and the police will independently investigate the incident, said Ekanayake.
The crime is suspected to be the work of an organised group, police said.
Statements have been recorded from seven women who had worked at the Bathuideen residence as domestic aides.