We have analyzed data on solar protons, neutrons, electrons, gamma‐ray, optical and microwave emissions for the 1990 May 24 solar flare. Taking into account high energy neutron and gamma‐ray observations, we have suggested two neutron injections occurred during the flare. These two injections are calledf‐ (first) ands‐ (second). Two components of interacting protons correspondingly existed to produce these neutrons at the Sun. The flare gave also a rise to solar cosmic ray event, which was detected by the neutron monitor network and GOES satellites. Two components of protons were observed in the interplanetary medium (p‐ (prompt) andd‐ (delayed) components). A possible spectrum of thes‐component of interacting protons coincided with injection spectrum ofp‐component of interplanetary protons. For this reason,s‐ andp‐ components of protons may be considered as different portions of a single population of accelerated particles in the solar corona. The net result is that three proton components (f‐,p/s‐, andd‐) were accelerated during flare process developing from the Sun to the interplanetary medium. ©1996 American Institute of Physics.