Hammond didn't criticize Algeria's handling of the attack directly, but he appeared to reference the increased concern from world leaders about the lack of transparency in Algeria's anti-terror operation.
"Different countries have different approaches to dealing with these things," he said. "But the nature of collaboration in confronting a global threat is that we work with people sometimes who do things somewhat different, slightly differently from the way we do them ourselves."
Panetta said that "those who would wantonly attack our country and our people will have no place to hide."
"Just as we cannot accept terrorism attacks against our cities, we cannot accept attacks against our citizens and our interests abroad," he said.
Baldor reported from London.