The U.S. Embassy in Islamabad issued the following Warden Message on 11 May 2009: “Several political parties have announced the call for a strike in Karachi on 12 May 2009. Previously, similar actions have generated large demonstrations or processions that have escalated into violence.
“Given the unpredictable nature of these events the U.S. Embassy advises all Americans throughout Pakistan to take appropriate individual precautions to ensure their safety and security at all times. These measures include maintaining good situational awareness, avoiding crowds and demonstrations and keeping a low profile. Americans should avoid setting patterns by varying times and routes for all required travel. Americans should ensure that their travel documents and visas are valid at all times.”