NEW : Extending tests is `` absolutely the best way '' forward , BP says . By John Walcott and David Jackson | An expert says no signs indicate a well casing breach . Officials are working to identify possible leaks of methane gas . The lull in gushing oil is allowing the government to jump-start its claims process .
NEW : Extending tests is `` absolutely the best way '' forward , BP says . NEW : An expert says no signs indicate a well casing breach . Officials are working to identify possible leaks of methane gas . The lull in gushing oil is allowing the government to jump-start its claims process .