Avijit Saptarshi, Superintendent of Police (SP), Tripura West, said, "16 police personnel were injured. Two vehicles were damaged by the IPFT activists at the Mandai and Khumulwung areas of the district."
He added that the police were attacked with bows and arrows and bottles and machetes.
"We fought pitched battles with the activists in at least five places," the SP said, adding that the situation was tense but under control.
Santanu Bhowmick, a journalist at 'Dinrat' news channel, was yesterday killed in West Tripura district while he was covering an IPFT agitation.
He was reportedly hit from behind and abducted at Mandai. Mr Bhowmick was subsequently found with serious stab injuries and was rushed to the Agartala Medical College and Hospital, where the doctors declared him "brought dead".
Internet services were suspended across the state in the aftermath of the incident, the SP said.
Meanwhile, the CPM today condemned the killing saying it shows a clear pattern of "silencing" of progressive journalists.
In a statement, the CPM Politburo accused "BJP-backed IPFT (Indigenous People's Front of Tripura) miscreants" for the killing of Santanu Bhowmick and demanded that the culprits be brought to book immediately.
Comparing the killing with the recent murder of noted scribe Gauri Lankesh in Bengaluru, the Left party said the killing of Mr Bhowmick shows "a clear pattern" emerging.
"There is a clear pattern in this employed by the RSS-BJP, particularly in the states where elections are due, of silencing progressive journalists and the dissemination of truth to the people," the CPM statement said.