Mumbai and the rest of Maharashtra state have been put on high alert following the blasts, with measures such as increased police presence on the streets and random vehicle searches.
Hours after the measures were announced, there was an alert at Newark International Airport near New York City as a man entered a secure area without being screened.
Brazil is not the worst offender when it comes to protectionism: it ranks behind Russia, Argentina, several European countries, India and China in discriminatory measures taken since November 2008, according to Global Trade Alert, a free-trade watchdog.