Published: Jul 19, 2010 1:00 AM EDT
Updated: Jul 18, 2010 10:00 PM EDT

NEW ORLEANS (AP) - There are signs of continuing tension between the government and BP executives amid concerns about a seep and possible methane near the busted oil well in the Gulf of Mexico.

A federal official says there could possibly be a leak in the well, which has been successfully capped off for three days.
      
At the same time, the official says BP is not complying with Washington's demand for more monitoring. The official spoke to the Associated Press on condition of anonymity, because an announcement about the next step in the oil spill crisis has not yet been made.
      
BP spokesman Mark Salt declined to comment on the specific allegation, except to say the company is working "very closely" with government scientists on the problem.

Retired Coast Guard Adm. Thad Allen will make the final decisions on the next step. The federal official says Allen would issue a letter to BP shortly, allowing testing to proceed in 24-hour increments, but also requiring more analysis of the seep and the possible observation of methane over the well.