SPRINGFIELD, Mo., Sept. 30 (AP)— A dynamite‐laden truck, operated by a struck company, was blown up today after it apparently was hit by a snip er's bullet. The driver was killed.

Two men, identified by an official of the company as com pany drivers until a strike be gan Sept. 14, were charged with second‐degree murder. The same charge was filed against the wife of one of the men.

Two other men and a woman were being held for questioning.

Those charged were identi fied by Prosecutor John Crow as Bobby Lee Shuler, 29 years old, Gerald Lee Bowden, 29, and his wife, Sharon Lynn Bowden, 27, all of Joplin, Mo.

R. E. Perkins, vice president of Tri‐State Motors, Inc., Jop lin, said Mr. Shuler and Mr. Bowden had driven for the com pany prior to the strike and were members of Teamsters Local 823. The company has continued to operate since the strike.