  We present new intensity and polarisation maps obtained with the QUIJOTE
experiment towards the Galactic regions W49, W51 and IC443, covering the
frequency range from 10 to 20 GHz at $\sim$ 1 deg angular resolution, with a
sensitivity in the range 35-79 ${\mu}$K/beam for total intensity and 13-23
${\mu}$K/beam for polarisation. For each region, we combine QUIJOTE maps with
ancillary data at frequencies ranging from 0.4 to 3000 GHz, reconstruct the
spectral energy distribution and model it with a combination of known
foregrounds. We detect anomalous microwave emission (AME) in total intensity
towards W49 at 4.7${\sigma}$ and W51 at 4.0${\sigma}$ with peak frequencies
${\nu}_{AME}$ = (20.0 $\pm$ 1.4) GHz and ${\nu}_{AME}$ = (17.7 $\pm$ 3.6) GHz
respectively; this is the first detection of AME towards W51. The contamination
from ultra-compact HII regions to the residual AME flux density is estimated at
10% in W49 and 5% in W51, and does not rule out the AME detection. The
polarised SEDs reveal a synchrotron contribution with spectral indices
${\alpha}_s$ = -0.67 $\pm$ 0.10 in W49 and ${\alpha}_s$ = -0.51 $\pm$ 0.07 in
W51, ascribed to the diffuse Galactic emission and to the local supernova
remnant respectively. Towards IC443 in total intensity we measure a broken
power-law synchrotron spectrum with cut-off frequency ${\nu}_{0,s}$ = (114
$\pm$ 73) GHz, in agreement with previous studies; our analysis, however, rules
out any AME contribution which had been previously claimed towards IC443. No
evidence of polarised AME emission is detected in this study.
