WASHINGTON: More American workers filed claims for unemployment insurance benefits last week but the trend continued at the lowest level in four decades as the job market improves, data showed on Thursday. The US Labour Department reported initial jobless claims, a sign of the pace of layoffs, rose by 9,000 to 269,000 in the week ending November 28. The previous week’s number was unrevised. The department said there were no special factors impacting the data.