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We present an analysis of seven intense X-ray flares observed from six stars(LAV 796, LAV 1174, SHM2002 3734, 2MASS 02191082+5707324, V553 Car, V557 Car)for the first time. These stars are located in the region of young open starclusters NGC 869 and IC 2602. These flares detected in the XMM-Newton data showa rapid rise (10-40 minutes) and a slow decay (20-90 minutes). The X-rayluminosities during the flares in the energy band 0.3-7.5 keV are in the rangeof $10^{29.9}$ to $10^{31.7}$ erg s$^{-1}$. The strongest flare was observedwith the ratio $\sim 13$ for count rates at peak of the flare to the quiescentintensity. The maximum temperature during the flares has been found to be$\sim$100 MK. The semi loop lengths for the flaring loops are estimated to beof the order of $\rm{10^{10}}$ cm. The physical parameters of the flaringstructure, the peak density, pressure, and minimum magnetic field required toconfine the plasma have been derived and found to be consistent with flaresfrom pre-main sequence stars in the Orion and the Taurus-Auriga-Perseus region.

X-ray flares observed from six young stars located in the region of star clusters NGC 869 and IC 2602