The probe team is trying to find the culprit by collecting scientific evidence. DySP J Santhosh Kumar and SHO B Jayan are heading the probe.
The incident happened near the Technocity at Pallipuram around 8 pm on Saturday.
The deceased has been identified as Ratheesh, 35, a Panoor native. He was the second accused in the murder case.
Youth League worker Paral Mansoor, 21, was hacked to death after the gang hurled bomb at the brothers late on April 6, soon after the voting for the Legisaltive Assembly election in Kerala.
In its plea, the ED alleged that the FIR was registered against its unnamed officials with the ulterior motive of derailing the investigation into a large economic offence of smuggling gold.
'Billy' by debutant director Shamon Navrang is one among the quintet being readied under the common title, Chithrahaar, narrates the story of three girls.
The death of Abdul Azeez, 15, was earlier investigated twice and concluded as a case of suicide, but a re-investigation was launched after a recently circulated video clip suggested foul play.
The police are considering the possibility of issuing a lookout notice against Tiju George Thomas, aged 33, from Melookkara near Kozhencherry in Pathanamthitta. He faced a similar accusation in Malaysia in 2013.
Some of the shops nearby were also destroyed. The attacks have caused concern in the politically sensitive district.
Alex, a native of Rajapalayam in Tamil Nadu, was arrested as per the POCSO Act.