article_snippet.sent: The attacks lasted four hours.
article_snippet.sent: two Taiz security officials said explosions lasted for about 40 minutes.
article_snippet.sent: Hakim Almasmari reported from Sanaa; Holly Yan reported and wrote from Atlanta.
article_snippet.sent: CNN's Mohammed Tawfeeq, Salim Essaid, Nic Robertson and Josh Levs contributed to this report.