Chipotle E.coli outbreak: It appears to be over:
Chipotle E. coli outbreak investigation closed. Investigation unable to ID contaminated food. https://t.co/XUBDqu3lCO— CDC (@CDCgov) February 1, 2016
A suicide bombing in Kabul: At least 20 people are dead in the attack in the west of the Afghan capital. The Taliban claimed responsibility.
More on the Iowa caucuses: We should have a clearer picture tonight of whether the past few months of campaigning by candidates give them the results they desire. Trump and Clinton lead their respective fields. You can read more at our Politics & Policy page.
News from the morning here.