In Pune, six people have been killed when a four-storied building collapsed this afternoon. The tragedy occurred around 2 pm when the Somnath building in the Sahakarnagar area of the city came crashing down . The ill-fated building was under constriction, four floors have been constructed and fifth floor was under construction, which collapsed today afternoon. Families residing on other floors stuck in to the debris. Fire brigade personnel have rushed to spot and rescued the trapped people. However, six people have lost their lives including five gents and one woman. The cause of mishap still not known and the investigations are on.