Tension continues to prevail in some parts here in Karachi as another four people have been killed in separate gun attacks on Friday, police said. According to details, a dead body was found dumped near a religious seminary in Korangi. Police said the victim was tortured to death after being kidnapped. Another dead body was found in the limit of Sarjani Town Police Station on L-1 Crossing Road. He was identified as Suleman son of Dilawar Khan. A 35 year- old man shot and killed in Jokhio Goth on Super Highway. Identity of the victim could not be established. In another incident, a 28 -year -old man was gunned down in Bukhari Colony. Police registered cases of the incidents and started investigation.