Washington: An arsenal of explosives and ammunition has been found at the home of a Chicago-born health worker and his Pakistani wife who killed 14 people and injured 21 others during a holiday party in California.

Chicago born Syed Rizwan Farook, 28, and Tashfeen Malik, 27, his Pakistani wife in the US. on a visa, were both dressed in tactical gear and armed with rifles, handguns and multiple ammunition magazines for the attack, media reports said.