A structure is observed in the Formula omitted mass spectrum in a sample of proton-proton collisions at centre-of-mass energies of 7, 8, and 13 TeV, collected with the LHCb detector and corresponding to a total integrated luminosity of 9 Formula omitted. The structure is interpreted as the result of overlapping excited Formula omitted states. With high significance, a two-peak hypothesis provides a better description of the data than a single resonance. Under this hypothesis the masses and widths of the two states, assuming they decay directly to Formula omitted, are determined to be m1=6063.5±1.2(stat)±0.8(syst)Me,GAMMA1=26±4(stat)±4(syst)Me,m2=6114±3(stat)±5(syst)Me,GAMMA2=66±18(stat)±21(syst)Me.Alternative values assuming a decay through Formula omitted, with a missing photon from the Formula omitted decay, which are shifted by approximately 45 Formula omittedV, are also determined. The possibility of a single state decaying in both channels is also considered. The ratio of the total production cross-section times branching fraction of the new states relative to the previously observed Formula omitted state is determined to be Formula omitted.