NEW : Truck loaded with more than a half - ton of explosives , official says . Pakistani military says two Americans assigned to Pakistan among dead . Pakistani president accused of terrorists : ` ` These people are not terrorists '' Police : Ivo Zdarek , Czech Republic 's ambassador to Pakistan , died in hotel room .
NEW : Truck loaded with more than a half-ton of explosives , official says . U.S. military says two Americans assigned to embassy among dead . Pakistani president says of perpetrators : `` These people are not Muslims '' Police : Ivo Zdarek , Czech Republic 's ambassador to Pakistan , died in hotel bombing .