Singapore should be aware of Putrajaya's stand with regard to the Kuala Lumpur-Singapore High-Speed Rail (HSR), said Prime Minister Dr Mahathir Mohamad.<br /><br />Mahathir had previously said that Malaysia intended to scrap the HSR project due to its high costs.<br /><br />Yesterday, the Singapore government said Putrajaya has yet to respond to its diplomatic note sent on June 1 regarding the project.<br /><br />The note inquired about Malaysia's position on the project as Singapore continues to incur costs.