Prime Minister Dr Mahathir Mohamad today said he was unaware of any lobbying by Jakarta for the released of Kim Jong-nam murder suspect Siti Aisyah after more than two years in detention.br br Speaking during a press conference in Parliament, Mahathir said that to his knowledge, Siti Aisyah's release was a decision by the courts.br br The Indonesian government had reportedly released a copy of a letter sent by its law minister Yasonna H Laoly to Putrajaya that pinned the blame for Jong-nam's death on North Korea.br br In his response to Laoly's letter, Attorney-General Tommy Thomas said Malaysia agreed to the request to drop the charges against Siti Aisyah.