The Hammers made enquiries for Corinthians striker Paolo Guerrero and Boca Juniors full-back Emanuel Insua but have been knocked back on both fronts
The Hammers are keen to make sure they have sufficient squad depth by the time the transfer window slams shut on September 1 but, having already spent over €25 million on seven new players, are now shopping exclusively in the loan market.
Corinthians striker Guerrero and Boca Juniors full-back Insua have been on their radar all summer, but their latest attempts to land the pair have been knocked back by both clubs.
Guerrero, 30, and Insua, 23, are both understood to be keen on making a move to England - and West Ham could yet return with improved terms.
Goal understands that Queens Park Rangers also have an interest in both players, while Sunderland are one of a number of clubs who remain keen on former Bayern Munich star Guerrero.