BAGHDAD — Civilian deaths rose slightly in August as a huge suicide attack in the north two weeks ago offset security gains elsewhere, making it the second deadliest month for Iraqis since the U.S. troop buildup began, according to figures compiled Saturday by The Associated Press.

U.S. deaths remained well below figures from last winter when the U.S began dispatching 30,000 additional troops to Iraq.

At least 1,809 civilians were killed in the month, compared to 1,760 in July, based on figures compiled by the AP from official Iraqi reports. That brings to 27,564 the number of Iraqi civilians killed since press agency began collecting data on April 28, 2005.