The father of one of the 11 rig workers killed in the rig explosion in the Gulf of Mexico in 2010 has voiced opposition to BP's plea agreement with the US government and asked a federal judge to impose higher penalty against the British oil giant, a newspaper reported Tuesday.

BP should be forced to pay $45 billion, 10 times the proposed penalty in its plea agreement with the US government,

to resolve manslaughter and other charges, Billy Anderson, father of Jason Anderson, said in a letter filed with the federal court in New Orleans.

Bill Anderson urged US District Judge Sarah Vance to reject BP's plea deal at a hearing on January 29, according to the website of the Houston Chronicle.

The letter, entered into the docket Tuesday, is the first victim impact statement filed with the court. Other rig workers' relatives are also expected to submit letters opposing the plea agreement, according to the report. "The plain and simple fact here is BP killed my son in their efforts to speed up operations, to save time and money, not only at the expense of my son's life, but also the lives of 10 of his crew members," Billy Anderson said.

The 2010 blowout of BP's Macondo well in the Gulf of Mexico triggered an explosion that killed 11 rig workers and unleashed the worst oil spill in US history.

Last month, BP reached an agreement with the US Justice Department to pay $4.5 billion in fines and other payments to resolve all federal criminal charges and all claims by the SEC against the company stemming from the 2010 Deepwater Horizon rig explosion, the subsequent oil spill and the response.

BP agreed to plead guilty to 14 criminal charges, including manslaughter and obstruction of Congress.