As per press reports, various blasts of low intensity occurred on railway tracks in different parts of Sindh like Karachi, Hyderabad, Nawabshah, Ghotki, Mehrabpur and Kotri on Feb. 11 and 12 and an unknown so-called organization namely Sindhdesh Liberation Army has taken the responsibility of the blasts. In my opinion, there is no existence of the so-called organization in Sindh. Nonetheless, it indicates difficult days for Sindh are coming again. It appears some quarters that matter are again conspiring against Sindh for onslaught. I appeal to Sindh government to fully investigate the matter and expose those found involved in such crimes. They must be dealt with according to law. MOHAMMAD KHAN SIAL, Karachi, February 12.