The directives have been issued to Karachi police to prevent lawyers and political workers from taking part in long march. Heavy police contingents have been deployed at Sindh High Court, City Court, Mazar-i-Quaid, Sohrab Goth and dozens of leaders and political workers have been arrested so far. Police overnight raided houses of lawyers' leaders and political workers after imposition of section 144. According to Karachi police chief Wasim Ahmad, 50 persons were arrested during these raids under MPO whereas JI workers have been arrested outside Sindh High Court for violating section 144. Police also started snap checking in the city.