article_snippet: Suicide bombers attacked two mosques in the Yemeni capital on Friday .
article_snippet: The bombers killed at least 137 worshippers and wounded hundreds more during Friday prayers .
article_snippet: On Friday, Islamic State affiliates claimed responsibility for two bombs at mosques in Sana'a.
article_snippet: As many as 150 people were killed in bomb blasts in the capital last week and 345 people were injured during the rush for Friday prayers.
article_snippet: If the group was behind the attacks, the group would mark the group first large-scale foray into the country and could raise the prospect of a bloody Shia versus Sunni conflict.
article_snippet: Triple suicide bombers hit a pair of mosques crowded with worshippers in the capital .
article_snippet: Triple suicide bombers targeted mosques frequented by Shiite Houthi rebels, who have controlled the capital since September .
article_snippet: A 2011 strike killed influential cleric Anwar al Awlaki, who was the motivator behind many terrorist attacks against the West and is said to have influenced the Charlie Hebdo attacks in Paris.
highlights_snippet: ISIS affiliates claimed responsibility for deadly bombs at Sana'a mosques .