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The occurrence of octupole shapes in even-mass neutron-rich Ba isotopes hasbeen well established. However, the situation with the odd-mass Ba and odd orodd-odd La nuclei around them is far from settled. In order to shed light onthese less-studied isotopes, a fast-timing experiment was performed usingGRIFFIN at TRIUMF-ISAC. A wealth of excited-state lifetimes in the 100~ps tofew ns range have been measured in $^{144, 145, 146}$Ba and $^{145,146}$Lapopulated in the $\beta^-$ and $\beta^--n$ decay of $^{145,146}$Cs. The resultsdo not allow to draw firm conclusions on the possible octupole deformation ofthese nuclei but suggest different spin and parity assignments than previousworks. This work highlights the need for more detailed study of the odd andodd-odd isotopes in this region to properly understand their structure.

$^{145}$Ba and $^{145, 146}$La structure from lifetime measurements