US president Barack Obama has said he will not be rushed as he decides whether to overhaul his military strategy in Afghanistan.

Obama and his national security team held the sixth in a series of Afghan strategy meetings at the White House on Monday, with the key issue of whether or not to send an additional 40,000 American troops to Afghanistan topping the agenda.

Obama's remarks come on the deadliest day for US forces in the country in more than four years with 14 American personnel killed in two helicopter crashes.

Al Jazeera's Rosiland Jordan reports.