Neymar has become increasingly frustrated seeing Barca's attempts to sign players close to him fall through.
Neymar, reports Don Balon, suspects Messi is behind the veto, particularly as both deals appeared to be on before the Argentine signed his new contract.
The Brazilian is now demanding talks with sports director Robert Fernandez to clarify why the players he has recommended have not arrived. Lima, for example, is handled by the management firm of Neymar's father.
The stalling of Barca's talks with Guangzhou Evergrande over Paulinho has only added to Neymar's frustration over the last 48 hours.