Sindh Chief Minister Syed Murad Ali Shah has issued directions for provincial home department to tighten the security of foreigners in Karachi, reported 24NewsHD TV channel on Saturday.
Foreign nationals working in different companies have been suggested to stay at home and not attend office for a few days.
The step was taken after Friday night's attack on Karachi Police Office in which four people were martyred.
Reporter Aajiz Jamali