Tajikistan's Avesta news agency quotes unidentified security sources as saying the man detonated a hand grenade as police were attempting to arrest him.
In neighboring Kyrgyzstan, Deputy Interior Minister Omurbek Suvanaliev today confirmed the reports.
Suvanaliev said the chief of police in Kyrgyzstan's Batken region, which borders Sughd Region to the north, had gone to Tajikistan to discuss the incident with their Tajik colleagues.
Suvanaliev said that Tajik security forces are looking for another suspected Islamic militant.
RFE/RL Central Asia Report
SUBSCRIBE For regular news and analysis on all five Central Asian countries by e-mail, subscribe to "RFE/RL Central Asia Report."